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Finding the Fourth Proportional to 1,053.30, 1,580.20 and 745.76

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Solution

The fourth proportional to 1,053.30, 1,580.20 and 745.76 is: 1,118.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.30 : 1,580.20 = 745.76 : x
  2. Step 2: Convert to fraction form
    1,053.30/1,580.20 = 745.76/x
  3. Step 3: Cross multiply
    1,053.30x = 1,580.20 × 745.76
  4. Step 4: Simplify right side
    1,053.30x = 1,178,449.95
  5. Step 5: Solve for x
    x = 1,178,449.95/1,053.30
  6. Step 6: Final answer
    x = 1,118.82

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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.