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Finding the Fourth Proportional to 399,553.40, 550,869.18 and 284,962.70

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Solution

The fourth proportional to 399,553.40, 550,869.18 and 284,962.70 is: 392,881.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,553.40 : 550,869.18 = 284,962.70 : x
  2. Step 2: Convert to fraction form
    399,553.40/550,869.18 = 284,962.70/x
  3. Step 3: Cross multiply
    399,553.40x = 550,869.18 × 284,962.70
  4. Step 4: Simplify right side
    399,553.40x = 156,977,168,879.59
  5. Step 5: Solve for x
    x = 156,977,168,879.59/399,553.40
  6. Step 6: Final answer
    x = 392,881.57

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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.