Home / 1,521.03-2,098.61-915.55

Finding the Fourth Proportional to 1,521.03, 2,098.61 and 915.55

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Solution

The fourth proportional to 1,521.03, 2,098.61 and 915.55 is: 1,263.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.03 : 2,098.61 = 915.55 : x
  2. Step 2: Convert to fraction form
    1,521.03/2,098.61 = 915.55/x
  3. Step 3: Cross multiply
    1,521.03x = 2,098.61 × 915.55
  4. Step 4: Simplify right side
    1,521.03x = 1,921,375.99
  5. Step 5: Solve for x
    x = 1,921,375.99/1,521.03
  6. Step 6: Final answer
    x = 1,263.20

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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.