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Finding the Fourth Proportional to 927.63, 1,385.34 and 790.92

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Solution

The fourth proportional to 927.63, 1,385.34 and 790.92 is: 1,181.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.63 : 1,385.34 = 790.92 : x
  2. Step 2: Convert to fraction form
    927.63/1,385.34 = 790.92/x
  3. Step 3: Cross multiply
    927.63x = 1,385.34 × 790.92
  4. Step 4: Simplify right side
    927.63x = 1,095,693.11
  5. Step 5: Solve for x
    x = 1,095,693.11/927.63
  6. Step 6: Final answer
    x = 1,181.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.