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Finding the Fourth Proportional to 915.14, 1,371.15 and 567.63

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Solution

The fourth proportional to 915.14, 1,371.15 and 567.63 is: 850.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.14 : 1,371.15 = 567.63 : x
  2. Step 2: Convert to fraction form
    915.14/1,371.15 = 567.63/x
  3. Step 3: Cross multiply
    915.14x = 1,371.15 × 567.63
  4. Step 4: Simplify right side
    915.14x = 778,305.87
  5. Step 5: Solve for x
    x = 778,305.87/915.14
  6. Step 6: Final answer
    x = 850.48

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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.