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Finding the Fourth Proportional to 552,488.13, 762,217.74 and 310,715.28

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Solution

The fourth proportional to 552,488.13, 762,217.74 and 310,715.28 is: 428,665.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,488.13 : 762,217.74 = 310,715.28 : x
  2. Step 2: Convert to fraction form
    552,488.13/762,217.74 = 310,715.28/x
  3. Step 3: Cross multiply
    552,488.13x = 762,217.74 × 310,715.28
  4. Step 4: Simplify right side
    552,488.13x = 236,832,698,505.07
  5. Step 5: Solve for x
    x = 236,832,698,505.07/552,488.13
  6. Step 6: Final answer
    x = 428,665.68

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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.