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Finding the Fourth Proportional to 962.07, 1,439.83 and 615.64

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Solution

The fourth proportional to 962.07, 1,439.83 and 615.64 is: 921.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.07 : 1,439.83 = 615.64 : x
  2. Step 2: Convert to fraction form
    962.07/1,439.83 = 615.64/x
  3. Step 3: Cross multiply
    962.07x = 1,439.83 × 615.64
  4. Step 4: Simplify right side
    962.07x = 886,416.94
  5. Step 5: Solve for x
    x = 886,416.94/962.07
  6. Step 6: Final answer
    x = 921.36

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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.