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Finding the Fourth Proportional to 308,545.78, 425,832.60 and 172,587.28

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Solution

The fourth proportional to 308,545.78, 425,832.60 and 172,587.28 is: 238,192.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,545.78 : 425,832.60 = 172,587.28 : x
  2. Step 2: Convert to fraction form
    308,545.78/425,832.60 = 172,587.28/x
  3. Step 3: Cross multiply
    308,545.78x = 425,832.60 × 172,587.28
  4. Step 4: Simplify right side
    308,545.78x = 73,493,290,169.33
  5. Step 5: Solve for x
    x = 73,493,290,169.33/308,545.78
  6. Step 6: Final answer
    x = 238,192.50

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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.