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Finding the Fourth Proportional to 962.24, 1,328.55 and 613.40

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Solution

The fourth proportional to 962.24, 1,328.55 and 613.40 is: 846.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.24 : 1,328.55 = 613.40 : x
  2. Step 2: Convert to fraction form
    962.24/1,328.55 = 613.40/x
  3. Step 3: Cross multiply
    962.24x = 1,328.55 × 613.40
  4. Step 4: Simplify right side
    962.24x = 814,932.57
  5. Step 5: Solve for x
    x = 814,932.57/962.24
  6. Step 6: Final answer
    x = 846.91

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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.