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Finding the Fourth Proportional to 529,218.20, 730,318.20 and 287,498.84

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Solution

The fourth proportional to 529,218.20, 730,318.20 and 287,498.84 is: 396,746.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,218.20 : 730,318.20 = 287,498.84 : x
  2. Step 2: Convert to fraction form
    529,218.20/730,318.20 = 287,498.84/x
  3. Step 3: Cross multiply
    529,218.20x = 730,318.20 × 287,498.84
  4. Step 4: Simplify right side
    529,218.20x = 209,965,635,330.89
  5. Step 5: Solve for x
    x = 209,965,635,330.89/529,218.20
  6. Step 6: Final answer
    x = 396,746.82

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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.