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Finding the Fourth Proportional to 621,508.78, 932,260.51 and 172,228.36

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Solution

The fourth proportional to 621,508.78, 932,260.51 and 172,228.36 is: 258,341.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,508.78 : 932,260.51 = 172,228.36 : x
  2. Step 2: Convert to fraction form
    621,508.78/932,260.51 = 172,228.36/x
  3. Step 3: Cross multiply
    621,508.78x = 932,260.51 × 172,228.36
  4. Step 4: Simplify right side
    621,508.78x = 160,561,698,847.08
  5. Step 5: Solve for x
    x = 160,561,698,847.08/621,508.78
  6. Step 6: Final answer
    x = 258,341.80

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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.