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Finding the Fourth Proportional to 1,545.68, 2,132.99 and 947.96

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Solution

The fourth proportional to 1,545.68, 2,132.99 and 947.96 is: 1,308.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.68 : 2,132.99 = 947.96 : x
  2. Step 2: Convert to fraction form
    1,545.68/2,132.99 = 947.96/x
  3. Step 3: Cross multiply
    1,545.68x = 2,132.99 × 947.96
  4. Step 4: Simplify right side
    1,545.68x = 2,021,973.80
  5. Step 5: Solve for x
    x = 2,021,973.80/1,545.68
  6. Step 6: Final answer
    x = 1,308.15

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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.