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Finding the Fourth Proportional to 962.10, 1,327.23 and 612.90

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Solution

The fourth proportional to 962.10, 1,327.23 and 612.90 is: 845.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.10 : 1,327.23 = 612.90 : x
  2. Step 2: Convert to fraction form
    962.10/1,327.23 = 612.90/x
  3. Step 3: Cross multiply
    962.10x = 1,327.23 × 612.90
  4. Step 4: Simplify right side
    962.10x = 813,459.27
  5. Step 5: Solve for x
    x = 813,459.27/962.10
  6. Step 6: Final answer
    x = 845.50

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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.