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Finding the Fourth Proportional to 420,638.64, 580,547.97 and 267,517.20

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Solution

The fourth proportional to 420,638.64, 580,547.97 and 267,517.20 is: 369,216.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,638.64 : 580,547.97 = 267,517.20 : x
  2. Step 2: Convert to fraction form
    420,638.64/580,547.97 = 267,517.20/x
  3. Step 3: Cross multiply
    420,638.64x = 580,547.97 × 267,517.20
  4. Step 4: Simplify right side
    420,638.64x = 155,306,567,400.08
  5. Step 5: Solve for x
    x = 155,306,567,400.08/420,638.64
  6. Step 6: Final answer
    x = 369,216.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.