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Finding the Fourth Proportional to 674.65, 1,012.70 and 349.93

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Solution

The fourth proportional to 674.65, 1,012.70 and 349.93 is: 525.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.65 : 1,012.70 = 349.93 : x
  2. Step 2: Convert to fraction form
    674.65/1,012.70 = 349.93/x
  3. Step 3: Cross multiply
    674.65x = 1,012.70 × 349.93
  4. Step 4: Simplify right side
    674.65x = 354,374.11
  5. Step 5: Solve for x
    x = 354,374.11/674.65
  6. Step 6: Final answer
    x = 525.27

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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.