Home / 1,146.08-1,719.22-521.78

Finding the Fourth Proportional to 1,146.08, 1,719.22 and 521.78

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Solution

The fourth proportional to 1,146.08, 1,719.22 and 521.78 is: 782.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.08 : 1,719.22 = 521.78 : x
  2. Step 2: Convert to fraction form
    1,146.08/1,719.22 = 521.78/x
  3. Step 3: Cross multiply
    1,146.08x = 1,719.22 × 521.78
  4. Step 4: Simplify right side
    1,146.08x = 897,054.61
  5. Step 5: Solve for x
    x = 897,054.61/1,146.08
  6. Step 6: Final answer
    x = 782.72

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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.