Home / 1,151.14-1,726.70-420.52

Finding the Fourth Proportional to 1,151.14, 1,726.70 and 420.52

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Solution

The fourth proportional to 1,151.14, 1,726.70 and 420.52 is: 630.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.14 : 1,726.70 = 420.52 : x
  2. Step 2: Convert to fraction form
    1,151.14/1,726.70 = 420.52/x
  3. Step 3: Cross multiply
    1,151.14x = 1,726.70 × 420.52
  4. Step 4: Simplify right side
    1,151.14x = 726,111.88
  5. Step 5: Solve for x
    x = 726,111.88/1,151.14
  6. Step 6: Final answer
    x = 630.78

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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.