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Finding the Fourth Proportional to 674.86, 931.85 and 438.93

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Solution

The fourth proportional to 674.86, 931.85 and 438.93 is: 606.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.86 : 931.85 = 438.93 : x
  2. Step 2: Convert to fraction form
    674.86/931.85 = 438.93/x
  3. Step 3: Cross multiply
    674.86x = 931.85 × 438.93
  4. Step 4: Simplify right side
    674.86x = 409,016.92
  5. Step 5: Solve for x
    x = 409,016.92/674.86
  6. Step 6: Final answer
    x = 606.08

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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.