Home / 1,545.18-2,132.45-915.58

Finding the Fourth Proportional to 1,545.18, 2,132.45 and 915.58

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Solution

The fourth proportional to 1,545.18, 2,132.45 and 915.58 is: 1,263.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.18 : 2,132.45 = 915.58 : x
  2. Step 2: Convert to fraction form
    1,545.18/2,132.45 = 915.58/x
  3. Step 3: Cross multiply
    1,545.18x = 2,132.45 × 915.58
  4. Step 4: Simplify right side
    1,545.18x = 1,952,428.57
  5. Step 5: Solve for x
    x = 1,952,428.57/1,545.18
  6. Step 6: Final answer
    x = 1,263.56

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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.