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Finding the Fourth Proportional to 399,315.52, 551,051.24 and 218,026.89

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Solution

The fourth proportional to 399,315.52, 551,051.24 and 218,026.89 is: 300,874.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,315.52 : 551,051.24 = 218,026.89 : x
  2. Step 2: Convert to fraction form
    399,315.52/551,051.24 = 218,026.89/x
  3. Step 3: Cross multiply
    399,315.52x = 551,051.24 × 218,026.89
  4. Step 4: Simplify right side
    399,315.52x = 120,143,988,632.91
  5. Step 5: Solve for x
    x = 120,143,988,632.91/399,315.52
  6. Step 6: Final answer
    x = 300,874.83

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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.