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Finding the Fourth Proportional to 672.27, 931.47 and 657.69

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Solution

The fourth proportional to 672.27, 931.47 and 657.69 is: 911.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.27 : 931.47 = 657.69 : x
  2. Step 2: Convert to fraction form
    672.27/931.47 = 657.69/x
  3. Step 3: Cross multiply
    672.27x = 931.47 × 657.69
  4. Step 4: Simplify right side
    672.27x = 612,612.89
  5. Step 5: Solve for x
    x = 612,612.89/672.27
  6. Step 6: Final answer
    x = 911.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.