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Finding the Fourth Proportional to 1,141.15, 1,711.72 and 275.46

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Solution

The fourth proportional to 1,141.15, 1,711.72 and 275.46 is: 413.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.15 : 1,711.72 = 275.46 : x
  2. Step 2: Convert to fraction form
    1,141.15/1,711.72 = 275.46/x
  3. Step 3: Cross multiply
    1,141.15x = 1,711.72 × 275.46
  4. Step 4: Simplify right side
    1,141.15x = 471,509.91
  5. Step 5: Solve for x
    x = 471,509.91/1,141.15
  6. Step 6: Final answer
    x = 413.19

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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.