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Finding the Fourth Proportional to 1,111.96, 1,667.80 and 462.61

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Solution

The fourth proportional to 1,111.96, 1,667.80 and 462.61 is: 693.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.96 : 1,667.80 = 462.61 : x
  2. Step 2: Convert to fraction form
    1,111.96/1,667.80 = 462.61/x
  3. Step 3: Cross multiply
    1,111.96x = 1,667.80 × 462.61
  4. Step 4: Simplify right side
    1,111.96x = 771,530.31
  5. Step 5: Solve for x
    x = 771,530.31/1,111.96
  6. Step 6: Final answer
    x = 693.85

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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.