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Finding the Fourth Proportional to 672.39, 927.88 and 377.65

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Solution

The fourth proportional to 672.39, 927.88 and 377.65 is: 521.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.39 : 927.88 = 377.65 : x
  2. Step 2: Convert to fraction form
    672.39/927.88 = 377.65/x
  3. Step 3: Cross multiply
    672.39x = 927.88 × 377.65
  4. Step 4: Simplify right side
    672.39x = 350,413.88
  5. Step 5: Solve for x
    x = 350,413.88/672.39
  6. Step 6: Final answer
    x = 521.15

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1.5x scale

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.