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Finding the Fourth Proportional to 762.04, 1,050.76 and 721

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Solution

The fourth proportional to 762.04, 1,050.76 and 721 is: 994.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.04 : 1,050.76 = 721 : x
  2. Step 2: Convert to fraction form
    762.04/1,050.76 = 721/x
  3. Step 3: Cross multiply
    762.04x = 1,050.76 × 721
  4. Step 4: Simplify right side
    762.04x = 757,597.96
  5. Step 5: Solve for x
    x = 757,597.96/762.04
  6. Step 6: Final answer
    x = 994.17

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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.