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Finding the Fourth Proportional to 916.95, 1,265.06 and 602.39

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Solution

The fourth proportional to 916.95, 1,265.06 and 602.39 is: 831.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.95 : 1,265.06 = 602.39 : x
  2. Step 2: Convert to fraction form
    916.95/1,265.06 = 602.39/x
  3. Step 3: Cross multiply
    916.95x = 1,265.06 × 602.39
  4. Step 4: Simplify right side
    916.95x = 762,056.62
  5. Step 5: Solve for x
    x = 762,056.62/916.95
  6. Step 6: Final answer
    x = 831.08

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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.