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Finding the Fourth Proportional to 617.49, 851.24 and 469.87

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Solution

The fourth proportional to 617.49, 851.24 and 469.87 is: 647.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.49 : 851.24 = 469.87 : x
  2. Step 2: Convert to fraction form
    617.49/851.24 = 469.87/x
  3. Step 3: Cross multiply
    617.49x = 851.24 × 469.87
  4. Step 4: Simplify right side
    617.49x = 399,971.19
  5. Step 5: Solve for x
    x = 399,971.19/617.49
  6. Step 6: Final answer
    x = 647.74

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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.