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Finding the Fourth Proportional to 899.46, 1,350.39 and 870.30

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Solution

The fourth proportional to 899.46, 1,350.39 and 870.30 is: 1,306.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.46 : 1,350.39 = 870.30 : x
  2. Step 2: Convert to fraction form
    899.46/1,350.39 = 870.30/x
  3. Step 3: Cross multiply
    899.46x = 1,350.39 × 870.30
  4. Step 4: Simplify right side
    899.46x = 1,175,244.42
  5. Step 5: Solve for x
    x = 1,175,244.42/899.46
  6. Step 6: Final answer
    x = 1,306.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.