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Finding the Fourth Proportional to 577,446.72, 866,160.54 and 172,639.86

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Solution

The fourth proportional to 577,446.72, 866,160.54 and 172,639.86 is: 258,956.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,446.72 : 866,160.54 = 172,639.86 : x
  2. Step 2: Convert to fraction form
    577,446.72/866,160.54 = 172,639.86/x
  3. Step 3: Cross multiply
    577,446.72x = 866,160.54 × 172,639.86
  4. Step 4: Simplify right side
    577,446.72x = 149,533,832,212.20
  5. Step 5: Solve for x
    x = 149,533,832,212.20/577,446.72
  6. Step 6: Final answer
    x = 258,956.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.