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Finding the Fourth Proportional to 865.91, 1,194.95 and 472.94

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Solution

The fourth proportional to 865.91, 1,194.95 and 472.94 is: 652.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.91 : 1,194.95 = 472.94 : x
  2. Step 2: Convert to fraction form
    865.91/1,194.95 = 472.94/x
  3. Step 3: Cross multiply
    865.91x = 1,194.95 × 472.94
  4. Step 4: Simplify right side
    865.91x = 565,139.65
  5. Step 5: Solve for x
    x = 565,139.65/865.91
  6. Step 6: Final answer
    x = 652.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.