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Finding the Fourth Proportional to 762.08, 1,050.72 and 721.04

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Solution

The fourth proportional to 762.08, 1,050.72 and 721.04 is: 994.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.08 : 1,050.72 = 721.04 : x
  2. Step 2: Convert to fraction form
    762.08/1,050.72 = 721.04/x
  3. Step 3: Cross multiply
    762.08x = 1,050.72 × 721.04
  4. Step 4: Simplify right side
    762.08x = 757,611.15
  5. Step 5: Solve for x
    x = 757,611.15/762.08
  6. Step 6: Final answer
    x = 994.14

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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.