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Finding the Fourth Proportional to 729.88, 1,006.74 and 554.92

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Solution

The fourth proportional to 729.88, 1,006.74 and 554.92 is: 765.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.88 : 1,006.74 = 554.92 : x
  2. Step 2: Convert to fraction form
    729.88/1,006.74 = 554.92/x
  3. Step 3: Cross multiply
    729.88x = 1,006.74 × 554.92
  4. Step 4: Simplify right side
    729.88x = 558,660.16
  5. Step 5: Solve for x
    x = 558,660.16/729.88
  6. Step 6: Final answer
    x = 765.41

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1.5x scale

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.