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Finding the Fourth Proportional to 478,545.80, 718,509.90 and 361,041.80

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Solution

The fourth proportional to 478,545.80, 718,509.90 and 361,041.80 is: 542,084.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,545.80 : 718,509.90 = 361,041.80 : x
  2. Step 2: Convert to fraction form
    478,545.80/718,509.90 = 361,041.80/x
  3. Step 3: Cross multiply
    478,545.80x = 718,509.90 × 361,041.80
  4. Step 4: Simplify right side
    478,545.80x = 259,412,107,613.82
  5. Step 5: Solve for x
    x = 259,412,107,613.82/478,545.80
  6. Step 6: Final answer
    x = 542,084.18

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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.