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Finding the Fourth Proportional to 811.52, 1,120.08 and 462.24

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Solution

The fourth proportional to 811.52, 1,120.08 and 462.24 is: 638.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.52 : 1,120.08 = 462.24 : x
  2. Step 2: Convert to fraction form
    811.52/1,120.08 = 462.24/x
  3. Step 3: Cross multiply
    811.52x = 1,120.08 × 462.24
  4. Step 4: Simplify right side
    811.52x = 517,745.78
  5. Step 5: Solve for x
    x = 517,745.78/811.52
  6. Step 6: Final answer
    x = 638.00

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1.5x scale

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.