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Finding the Fourth Proportional to 399,909.55, 551,875.65 and 230,143.81

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Solution

The fourth proportional to 399,909.55, 551,875.65 and 230,143.81 is: 317,598.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,909.55 : 551,875.65 = 230,143.81 : x
  2. Step 2: Convert to fraction form
    399,909.55/551,875.65 = 230,143.81/x
  3. Step 3: Cross multiply
    399,909.55x = 551,875.65 × 230,143.81
  4. Step 4: Simplify right side
    399,909.55x = 127,010,764,737.23
  5. Step 5: Solve for x
    x = 127,010,764,737.23/399,909.55
  6. Step 6: Final answer
    x = 317,598.73

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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.