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Finding the Fourth Proportional to 756.04, 1,045.38 and 721

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Solution

The fourth proportional to 756.04, 1,045.38 and 721 is: 996.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.04 : 1,045.38 = 721 : x
  2. Step 2: Convert to fraction form
    756.04/1,045.38 = 721/x
  3. Step 3: Cross multiply
    756.04x = 1,045.38 × 721
  4. Step 4: Simplify right side
    756.04x = 753,718.98
  5. Step 5: Solve for x
    x = 753,718.98/756.04
  6. Step 6: Final answer
    x = 996.93

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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.