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Finding the Fourth Proportional to 942.86, 1,414.31 and 557.84

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Solution

The fourth proportional to 942.86, 1,414.31 and 557.84 is: 836.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.86 : 1,414.31 = 557.84 : x
  2. Step 2: Convert to fraction form
    942.86/1,414.31 = 557.84/x
  3. Step 3: Cross multiply
    942.86x = 1,414.31 × 557.84
  4. Step 4: Simplify right side
    942.86x = 788,948.83
  5. Step 5: Solve for x
    x = 788,948.83/942.86
  6. Step 6: Final answer
    x = 836.77

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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.