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Finding the Fourth Proportional to 518,645.60, 777,968.40 and 487,152.80

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Solution

The fourth proportional to 518,645.60, 777,968.40 and 487,152.80 is: 730,729.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,645.60 : 777,968.40 = 487,152.80 : x
  2. Step 2: Convert to fraction form
    518,645.60/777,968.40 = 487,152.80/x
  3. Step 3: Cross multiply
    518,645.60x = 777,968.40 × 487,152.80
  4. Step 4: Simplify right side
    518,645.60x = 378,989,484,371.52
  5. Step 5: Solve for x
    x = 378,989,484,371.52/518,645.60
  6. Step 6: Final answer
    x = 730,729.20

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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.