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Finding the Fourth Proportional to 916.83, 1,265.49 and 633.39

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Solution

The fourth proportional to 916.83, 1,265.49 and 633.39 is: 874.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.83 : 1,265.49 = 633.39 : x
  2. Step 2: Convert to fraction form
    916.83/1,265.49 = 633.39/x
  3. Step 3: Cross multiply
    916.83x = 1,265.49 × 633.39
  4. Step 4: Simplify right side
    916.83x = 801,548.71
  5. Step 5: Solve for x
    x = 801,548.71/916.83
  6. Step 6: Final answer
    x = 874.26

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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.