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Finding the Fourth Proportional to 674.98, 1,011.80 and 345.92

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Solution

The fourth proportional to 674.98, 1,011.80 and 345.92 is: 518.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.98 : 1,011.80 = 345.92 : x
  2. Step 2: Convert to fraction form
    674.98/1,011.80 = 345.92/x
  3. Step 3: Cross multiply
    674.98x = 1,011.80 × 345.92
  4. Step 4: Simplify right side
    674.98x = 349,997.66
  5. Step 5: Solve for x
    x = 349,997.66/674.98
  6. Step 6: Final answer
    x = 518.53

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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.