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Finding the Fourth Proportional to 916.69, 1,264.71 and 523.43

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Solution

The fourth proportional to 916.69, 1,264.71 and 523.43 is: 722.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.69 : 1,264.71 = 523.43 : x
  2. Step 2: Convert to fraction form
    916.69/1,264.71 = 523.43/x
  3. Step 3: Cross multiply
    916.69x = 1,264.71 × 523.43
  4. Step 4: Simplify right side
    916.69x = 661,987.16
  5. Step 5: Solve for x
    x = 661,987.16/916.69
  6. Step 6: Final answer
    x = 722.15

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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.