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Finding the Fourth Proportional to 635.47, 945.71 and 615.22

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Solution

The fourth proportional to 635.47, 945.71 and 615.22 is: 915.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.47 : 945.71 = 615.22 : x
  2. Step 2: Convert to fraction form
    635.47/945.71 = 615.22/x
  3. Step 3: Cross multiply
    635.47x = 945.71 × 615.22
  4. Step 4: Simplify right side
    635.47x = 581,819.71
  5. Step 5: Solve for x
    x = 581,819.71/635.47
  6. Step 6: Final answer
    x = 915.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.