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Finding the Fourth Proportional to 1,675.15, 2,512.67 and 442.57

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Solution

The fourth proportional to 1,675.15, 2,512.67 and 442.57 is: 663.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,675.15 : 2,512.67 = 442.57 : x
  2. Step 2: Convert to fraction form
    1,675.15/2,512.67 = 442.57/x
  3. Step 3: Cross multiply
    1,675.15x = 2,512.67 × 442.57
  4. Step 4: Simplify right side
    1,675.15x = 1,112,019.80
  5. Step 5: Solve for x
    x = 1,112,019.80/1,675.15
  6. Step 6: Final answer
    x = 663.83

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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.