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Finding the Fourth Proportional to 399,384.27, 551,129.76 and 218,061.27

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Solution

The fourth proportional to 399,384.27, 551,129.76 and 218,061.27 is: 300,913.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,384.27 : 551,129.76 = 218,061.27 : x
  2. Step 2: Convert to fraction form
    399,384.27/551,129.76 = 218,061.27/x
  3. Step 3: Cross multiply
    399,384.27x = 551,129.76 × 218,061.27
  4. Step 4: Simplify right side
    399,384.27x = 120,180,055,400.40
  5. Step 5: Solve for x
    x = 120,180,055,400.40/399,384.27
  6. Step 6: Final answer
    x = 300,913.34

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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.