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Finding the Fourth Proportional to 674.02, 1,011.27 and 289.06

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Solution

The fourth proportional to 674.02, 1,011.27 and 289.06 is: 433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.02 : 1,011.27 = 289.06 : x
  2. Step 2: Convert to fraction form
    674.02/1,011.27 = 289.06/x
  3. Step 3: Cross multiply
    674.02x = 1,011.27 × 289.06
  4. Step 4: Simplify right side
    674.02x = 292,317.71
  5. Step 5: Solve for x
    x = 292,317.71/674.02
  6. Step 6: Final answer
    x = 433.69

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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.