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Finding the Fourth Proportional to 674.66, 931.05 and 395.07

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Solution

The fourth proportional to 674.66, 931.05 and 395.07 is: 545.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.66 : 931.05 = 395.07 : x
  2. Step 2: Convert to fraction form
    674.66/931.05 = 395.07/x
  3. Step 3: Cross multiply
    674.66x = 931.05 × 395.07
  4. Step 4: Simplify right side
    674.66x = 367,829.92
  5. Step 5: Solve for x
    x = 367,829.92/674.66
  6. Step 6: Final answer
    x = 545.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.