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Finding the Fourth Proportional to 651,781.20, 977,671.80 and 385,404.60

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Solution

The fourth proportional to 651,781.20, 977,671.80 and 385,404.60 is: 578,106.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,781.20 : 977,671.80 = 385,404.60 : x
  2. Step 2: Convert to fraction form
    651,781.20/977,671.80 = 385,404.60/x
  3. Step 3: Cross multiply
    651,781.20x = 977,671.80 × 385,404.60
  4. Step 4: Simplify right side
    651,781.20x = 376,799,209,010.28
  5. Step 5: Solve for x
    x = 376,799,209,010.28/651,781.20
  6. Step 6: Final answer
    x = 578,106.90

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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.