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Finding the Fourth Proportional to 701.42, 1,050.87 and 412.70

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Solution

The fourth proportional to 701.42, 1,050.87 and 412.70 is: 618.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.42 : 1,050.87 = 412.70 : x
  2. Step 2: Convert to fraction form
    701.42/1,050.87 = 412.70/x
  3. Step 3: Cross multiply
    701.42x = 1,050.87 × 412.70
  4. Step 4: Simplify right side
    701.42x = 433,694.05
  5. Step 5: Solve for x
    x = 433,694.05/701.42
  6. Step 6: Final answer
    x = 618.31

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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.