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Finding the Fourth Proportional to 674.76, 931.62 and 439.02

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Solution

The fourth proportional to 674.76, 931.62 and 439.02 is: 606.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.76 : 931.62 = 439.02 : x
  2. Step 2: Convert to fraction form
    674.76/931.62 = 439.02/x
  3. Step 3: Cross multiply
    674.76x = 931.62 × 439.02
  4. Step 4: Simplify right side
    674.76x = 408,999.81
  5. Step 5: Solve for x
    x = 408,999.81/674.76
  6. Step 6: Final answer
    x = 606.14

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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.