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Finding the Fourth Proportional to 962.11, 1,440.55 and 613.56

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Solution

The fourth proportional to 962.11, 1,440.55 and 613.56 is: 918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.11 : 1,440.55 = 613.56 : x
  2. Step 2: Convert to fraction form
    962.11/1,440.55 = 613.56/x
  3. Step 3: Cross multiply
    962.11x = 1,440.55 × 613.56
  4. Step 4: Simplify right side
    962.11x = 883,870.03
  5. Step 5: Solve for x
    x = 883,870.03/962.11
  6. Step 6: Final answer
    x = 918.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.