Home / 628,002.60-942,003.90-391,612.20

Finding the Fourth Proportional to 628,002.60, 942,003.90 and 391,612.20

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Solution

The fourth proportional to 628,002.60, 942,003.90 and 391,612.20 is: 587,418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,002.60 : 942,003.90 = 391,612.20 : x
  2. Step 2: Convert to fraction form
    628,002.60/942,003.90 = 391,612.20/x
  3. Step 3: Cross multiply
    628,002.60x = 942,003.90 × 391,612.20
  4. Step 4: Simplify right side
    628,002.60x = 368,900,219,687.58
  5. Step 5: Solve for x
    x = 368,900,219,687.58/628,002.60
  6. Step 6: Final answer
    x = 587,418.30

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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.