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Finding the Fourth Proportional to 674.04, 931.20 and 612.84

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Solution

The fourth proportional to 674.04, 931.20 and 612.84 is: 846.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.04 : 931.20 = 612.84 : x
  2. Step 2: Convert to fraction form
    674.04/931.20 = 612.84/x
  3. Step 3: Cross multiply
    674.04x = 931.20 × 612.84
  4. Step 4: Simplify right side
    674.04x = 570,676.61
  5. Step 5: Solve for x
    x = 570,676.61/674.04
  6. Step 6: Final answer
    x = 846.65

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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.