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Finding the Fourth Proportional to 656.15, 985.57 and 634.28

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Solution

The fourth proportional to 656.15, 985.57 and 634.28 is: 952.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.15 : 985.57 = 634.28 : x
  2. Step 2: Convert to fraction form
    656.15/985.57 = 634.28/x
  3. Step 3: Cross multiply
    656.15x = 985.57 × 634.28
  4. Step 4: Simplify right side
    656.15x = 625,127.34
  5. Step 5: Solve for x
    x = 625,127.34/656.15
  6. Step 6: Final answer
    x = 952.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.