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Finding the Fourth Proportional to 1,162.13, 1,603.14 and 763.74

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Solution

The fourth proportional to 1,162.13, 1,603.14 and 763.74 is: 1,053.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.13 : 1,603.14 = 763.74 : x
  2. Step 2: Convert to fraction form
    1,162.13/1,603.14 = 763.74/x
  3. Step 3: Cross multiply
    1,162.13x = 1,603.14 × 763.74
  4. Step 4: Simplify right side
    1,162.13x = 1,224,382.14
  5. Step 5: Solve for x
    x = 1,224,382.14/1,162.13
  6. Step 6: Final answer
    x = 1,053.57

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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.