Home / 649,628,938.80-974,443,408.20-391,348,612.80

Finding the Fourth Proportional to 649,628,938.80, 974,443,408.20 and 391,348,612.80

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Solution

The fourth proportional to 649,628,938.80, 974,443,408.20 and 391,348,612.80 is: 587,022,919.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,628,938.80 : 974,443,408.20 = 391,348,612.80 : x
  2. Step 2: Convert to fraction form
    649,628,938.80/974,443,408.20 = 391,348,612.80/x
  3. Step 3: Cross multiply
    649,628,938.80x = 974,443,408.20 × 391,348,612.80
  4. Step 4: Simplify right side
    649,628,938.80x = 381,347,076,051,174,144
  5. Step 5: Solve for x
    x = 381,347,076,051,174,144/649,628,938.80
  6. Step 6: Final answer
    x = 587,022,919.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.