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Finding the Fourth Proportional to 1,242.75, 1,864.73 and 512.94

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Solution

The fourth proportional to 1,242.75, 1,864.73 and 512.94 is: 769.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.75 : 1,864.73 = 512.94 : x
  2. Step 2: Convert to fraction form
    1,242.75/1,864.73 = 512.94/x
  3. Step 3: Cross multiply
    1,242.75x = 1,864.73 × 512.94
  4. Step 4: Simplify right side
    1,242.75x = 956,494.61
  5. Step 5: Solve for x
    x = 956,494.61/1,242.75
  6. Step 6: Final answer
    x = 769.66

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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.