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Finding the Fourth Proportional to 278,139.60, 417,209.40 and 267,253.20

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Solution

The fourth proportional to 278,139.60, 417,209.40 and 267,253.20 is: 400,879.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,139.60 : 417,209.40 = 267,253.20 : x
  2. Step 2: Convert to fraction form
    278,139.60/417,209.40 = 267,253.20/x
  3. Step 3: Cross multiply
    278,139.60x = 417,209.40 × 267,253.20
  4. Step 4: Simplify right side
    278,139.60x = 111,500,547,220.08
  5. Step 5: Solve for x
    x = 111,500,547,220.08/278,139.60
  6. Step 6: Final answer
    x = 400,879.80

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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.