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Finding the Fourth Proportional to 916.13, 1,373.75 and 453.76

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Solution

The fourth proportional to 916.13, 1,373.75 and 453.76 is: 680.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.13 : 1,373.75 = 453.76 : x
  2. Step 2: Convert to fraction form
    916.13/1,373.75 = 453.76/x
  3. Step 3: Cross multiply
    916.13x = 1,373.75 × 453.76
  4. Step 4: Simplify right side
    916.13x = 623,352.80
  5. Step 5: Solve for x
    x = 623,352.80/916.13
  6. Step 6: Final answer
    x = 680.42

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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.