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Finding the Fourth Proportional to 399,551.40, 550,866.42 and 284,960.70

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Solution

The fourth proportional to 399,551.40, 550,866.42 and 284,960.70 is: 392,878.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,551.40 : 550,866.42 = 284,960.70 : x
  2. Step 2: Convert to fraction form
    399,551.40/550,866.42 = 284,960.70/x
  3. Step 3: Cross multiply
    399,551.40x = 550,866.42 × 284,960.70
  4. Step 4: Simplify right side
    399,551.40x = 156,975,280,649.69
  5. Step 5: Solve for x
    x = 156,975,280,649.69/399,551.40
  6. Step 6: Final answer
    x = 392,878.82

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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.