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Finding the Fourth Proportional to 1,059.52, 1,461.86 and 640.11

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Solution

The fourth proportional to 1,059.52, 1,461.86 and 640.11 is: 883.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.52 : 1,461.86 = 640.11 : x
  2. Step 2: Convert to fraction form
    1,059.52/1,461.86 = 640.11/x
  3. Step 3: Cross multiply
    1,059.52x = 1,461.86 × 640.11
  4. Step 4: Simplify right side
    1,059.52x = 935,751.20
  5. Step 5: Solve for x
    x = 935,751.20/1,059.52
  6. Step 6: Final answer
    x = 883.18

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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.