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Finding the Fourth Proportional to 701.18, 1,051.98 and 408.62

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Solution

The fourth proportional to 701.18, 1,051.98 and 408.62 is: 613.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.18 : 1,051.98 = 408.62 : x
  2. Step 2: Convert to fraction form
    701.18/1,051.98 = 408.62/x
  3. Step 3: Cross multiply
    701.18x = 1,051.98 × 408.62
  4. Step 4: Simplify right side
    701.18x = 429,860.07
  5. Step 5: Solve for x
    x = 429,860.07/701.18
  6. Step 6: Final answer
    x = 613.05

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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.