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Finding the Fourth Proportional to 551,545.08, 761,049.30 and 309,781.32

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Solution

The fourth proportional to 551,545.08, 761,049.30 and 309,781.32 is: 427,451.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,545.08 : 761,049.30 = 309,781.32 : x
  2. Step 2: Convert to fraction form
    551,545.08/761,049.30 = 309,781.32/x
  3. Step 3: Cross multiply
    551,545.08x = 761,049.30 × 309,781.32
  4. Step 4: Simplify right side
    551,545.08x = 235,758,856,739.08
  5. Step 5: Solve for x
    x = 235,758,856,739.08/551,545.08
  6. Step 6: Final answer
    x = 427,451.65

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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.