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Finding the Fourth Proportional to 1,161.47, 1,742.12 and 545.32

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Solution

The fourth proportional to 1,161.47, 1,742.12 and 545.32 is: 817.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.47 : 1,742.12 = 545.32 : x
  2. Step 2: Convert to fraction form
    1,161.47/1,742.12 = 545.32/x
  3. Step 3: Cross multiply
    1,161.47x = 1,742.12 × 545.32
  4. Step 4: Simplify right side
    1,161.47x = 950,004.17
  5. Step 5: Solve for x
    x = 950,004.17/1,161.47
  6. Step 6: Final answer
    x = 817.93

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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.