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Finding the Fourth Proportional to 567,139.16, 782,686.98 and 312,490.28

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Solution

The fourth proportional to 567,139.16, 782,686.98 and 312,490.28 is: 431,255.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,139.16 : 782,686.98 = 312,490.28 : x
  2. Step 2: Convert to fraction form
    567,139.16/782,686.98 = 312,490.28/x
  3. Step 3: Cross multiply
    567,139.16x = 782,686.98 × 312,490.28
  4. Step 4: Simplify right side
    567,139.16x = 244,582,073,532.55
  5. Step 5: Solve for x
    x = 244,582,073,532.55/567,139.16
  6. Step 6: Final answer
    x = 431,255.84

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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.