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Finding the Fourth Proportional to 916.92, 1,264.01 and 750.87

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Solution

The fourth proportional to 916.92, 1,264.01 and 750.87 is: 1,035.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.92 : 1,264.01 = 750.87 : x
  2. Step 2: Convert to fraction form
    916.92/1,264.01 = 750.87/x
  3. Step 3: Cross multiply
    916.92x = 1,264.01 × 750.87
  4. Step 4: Simplify right side
    916.92x = 949,103.43
  5. Step 5: Solve for x
    x = 949,103.43/916.92
  6. Step 6: Final answer
    x = 1,035.10

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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.