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Finding the Fourth Proportional to 674.79, 1,011.75 and 544.95

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Solution

The fourth proportional to 674.79, 1,011.75 and 544.95 is: 817.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.79 : 1,011.75 = 544.95 : x
  2. Step 2: Convert to fraction form
    674.79/1,011.75 = 544.95/x
  3. Step 3: Cross multiply
    674.79x = 1,011.75 × 544.95
  4. Step 4: Simplify right side
    674.79x = 551,353.16
  5. Step 5: Solve for x
    x = 551,353.16/674.79
  6. Step 6: Final answer
    x = 817.07

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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.