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Finding the Fourth Proportional to 675.77, 1,013.19 and 345.90

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Solution

The fourth proportional to 675.77, 1,013.19 and 345.90 is: 518.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.77 : 1,013.19 = 345.90 : x
  2. Step 2: Convert to fraction form
    675.77/1,013.19 = 345.90/x
  3. Step 3: Cross multiply
    675.77x = 1,013.19 × 345.90
  4. Step 4: Simplify right side
    675.77x = 350,462.42
  5. Step 5: Solve for x
    x = 350,462.42/675.77
  6. Step 6: Final answer
    x = 518.61

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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.