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Finding the Fourth Proportional to 672.30, 931.53 and 657.18

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Solution

The fourth proportional to 672.30, 931.53 and 657.18 is: 910.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.30 : 931.53 = 657.18 : x
  2. Step 2: Convert to fraction form
    672.30/931.53 = 657.18/x
  3. Step 3: Cross multiply
    672.30x = 931.53 × 657.18
  4. Step 4: Simplify right side
    672.30x = 612,182.89
  5. Step 5: Solve for x
    x = 612,182.89/672.30
  6. Step 6: Final answer
    x = 910.58

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Double scale
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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.