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Finding the Fourth Proportional to 518,820.98, 715,972.53 and 280,356.98

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Solution

The fourth proportional to 518,820.98, 715,972.53 and 280,356.98 is: 386,892.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,820.98 : 715,972.53 = 280,356.98 : x
  2. Step 2: Convert to fraction form
    518,820.98/715,972.53 = 280,356.98/x
  3. Step 3: Cross multiply
    518,820.98x = 715,972.53 × 280,356.98
  4. Step 4: Simplify right side
    518,820.98x = 200,727,896,273.76
  5. Step 5: Solve for x
    x = 200,727,896,273.76/518,820.98
  6. Step 6: Final answer
    x = 386,892.40

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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.