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Finding the Fourth Proportional to 1,151.80, 1,727.70 and 286.11

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Solution

The fourth proportional to 1,151.80, 1,727.70 and 286.11 is: 429.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.80 : 1,727.70 = 286.11 : x
  2. Step 2: Convert to fraction form
    1,151.80/1,727.70 = 286.11/x
  3. Step 3: Cross multiply
    1,151.80x = 1,727.70 × 286.11
  4. Step 4: Simplify right side
    1,151.80x = 494,312.25
  5. Step 5: Solve for x
    x = 494,312.25/1,151.80
  6. Step 6: Final answer
    x = 429.17

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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.