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Finding the Fourth Proportional to 672.69, 928.31 and 377.99

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Solution

The fourth proportional to 672.69, 928.31 and 377.99 is: 521.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.69 : 928.31 = 377.99 : x
  2. Step 2: Convert to fraction form
    672.69/928.31 = 377.99/x
  3. Step 3: Cross multiply
    672.69x = 928.31 × 377.99
  4. Step 4: Simplify right side
    672.69x = 350,885.37
  5. Step 5: Solve for x
    x = 350,885.37/672.69
  6. Step 6: Final answer
    x = 521.62

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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.