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Finding the Fourth Proportional to 621,421.92, 932,153.52 and 172,147.32

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Solution

The fourth proportional to 621,421.92, 932,153.52 and 172,147.32 is: 258,226.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,421.92 : 932,153.52 = 172,147.32 : x
  2. Step 2: Convert to fraction form
    621,421.92/932,153.52 = 172,147.32/x
  3. Step 3: Cross multiply
    621,421.92x = 932,153.52 × 172,147.32
  4. Step 4: Simplify right side
    621,421.92x = 160,467,730,296.57
  5. Step 5: Solve for x
    x = 160,467,730,296.57/621,421.92
  6. Step 6: Final answer
    x = 258,226.70

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1.5x scale

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.