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Finding the Fourth Proportional to 518,851.20, 778,276.80 and 144,873.60

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Solution

The fourth proportional to 518,851.20, 778,276.80 and 144,873.60 is: 217,310.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,851.20 : 778,276.80 = 144,873.60 : x
  2. Step 2: Convert to fraction form
    518,851.20/778,276.80 = 144,873.60/x
  3. Step 3: Cross multiply
    518,851.20x = 778,276.80 × 144,873.60
  4. Step 4: Simplify right side
    518,851.20x = 112,751,761,812.48
  5. Step 5: Solve for x
    x = 112,751,761,812.48/518,851.20
  6. Step 6: Final answer
    x = 217,310.40

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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.