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Finding the Fourth Proportional to 1,111.46, 1,667.12 and 341.96

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Solution

The fourth proportional to 1,111.46, 1,667.12 and 341.96 is: 512.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.46 : 1,667.12 = 341.96 : x
  2. Step 2: Convert to fraction form
    1,111.46/1,667.12 = 341.96/x
  3. Step 3: Cross multiply
    1,111.46x = 1,667.12 × 341.96
  4. Step 4: Simplify right side
    1,111.46x = 570,088.36
  5. Step 5: Solve for x
    x = 570,088.36/1,111.46
  6. Step 6: Final answer
    x = 512.92

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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.