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Finding the Fourth Proportional to 399,393.27, 551,142.18 and 218,070.27

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Solution

The fourth proportional to 399,393.27, 551,142.18 and 218,070.27 is: 300,925.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,393.27 : 551,142.18 = 218,070.27 : x
  2. Step 2: Convert to fraction form
    399,393.27/551,142.18 = 218,070.27/x
  3. Step 3: Cross multiply
    399,393.27x = 551,142.18 × 218,070.27
  4. Step 4: Simplify right side
    399,393.27x = 120,187,724,000.99
  5. Step 5: Solve for x
    x = 120,187,724,000.99/399,393.27
  6. Step 6: Final answer
    x = 300,925.76

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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.