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Finding the Fourth Proportional to 529,142.46, 730,230.18 and 287,438.87

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Solution

The fourth proportional to 529,142.46, 730,230.18 and 287,438.87 is: 396,673.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,142.46 : 730,230.18 = 287,438.87 : x
  2. Step 2: Convert to fraction form
    529,142.46/730,230.18 = 287,438.87/x
  3. Step 3: Cross multiply
    529,142.46x = 730,230.18 × 287,438.87
  4. Step 4: Simplify right side
    529,142.46x = 209,896,537,779.10
  5. Step 5: Solve for x
    x = 209,896,537,779.10/529,142.46
  6. Step 6: Final answer
    x = 396,673.02

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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.