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Finding the Fourth Proportional to 922.36, 1,381.52 and 715.30

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Solution

The fourth proportional to 922.36, 1,381.52 and 715.30 is: 1,071.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.36 : 1,381.52 = 715.30 : x
  2. Step 2: Convert to fraction form
    922.36/1,381.52 = 715.30/x
  3. Step 3: Cross multiply
    922.36x = 1,381.52 × 715.30
  4. Step 4: Simplify right side
    922.36x = 988,201.26
  5. Step 5: Solve for x
    x = 988,201.26/922.36
  6. Step 6: Final answer
    x = 1,071.38

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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.