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Finding the Fourth Proportional to 399,372.84, 551,130.21 and 218,084.22

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Solution

The fourth proportional to 399,372.84, 551,130.21 and 218,084.22 is: 300,953.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,372.84 : 551,130.21 = 218,084.22 : x
  2. Step 2: Convert to fraction form
    399,372.84/551,130.21 = 218,084.22/x
  3. Step 3: Cross multiply
    399,372.84x = 551,130.21 × 218,084.22
  4. Step 4: Simplify right side
    399,372.84x = 120,192,801,966.29
  5. Step 5: Solve for x
    x = 120,192,801,966.29/399,372.84
  6. Step 6: Final answer
    x = 300,953.87

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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.