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Finding the Fourth Proportional to 865.19, 1,193.99 and 472.25

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Solution

The fourth proportional to 865.19, 1,193.99 and 472.25 is: 651.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.19 : 1,193.99 = 472.25 : x
  2. Step 2: Convert to fraction form
    865.19/1,193.99 = 472.25/x
  3. Step 3: Cross multiply
    865.19x = 1,193.99 × 472.25
  4. Step 4: Simplify right side
    865.19x = 563,862.40
  5. Step 5: Solve for x
    x = 563,862.40/865.19
  6. Step 6: Final answer
    x = 651.72

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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.