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Finding the Fourth Proportional to 675.87, 1,015.66 and 402.02

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Solution

The fourth proportional to 675.87, 1,015.66 and 402.02 is: 604.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.87 : 1,015.66 = 402.02 : x
  2. Step 2: Convert to fraction form
    675.87/1,015.66 = 402.02/x
  3. Step 3: Cross multiply
    675.87x = 1,015.66 × 402.02
  4. Step 4: Simplify right side
    675.87x = 408,315.63
  5. Step 5: Solve for x
    x = 408,315.63/675.87
  6. Step 6: Final answer
    x = 604.13

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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.