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Finding the Fourth Proportional to 672.33, 928.09 and 578.70

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Solution

The fourth proportional to 672.33, 928.09 and 578.70 is: 798.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.33 : 928.09 = 578.70 : x
  2. Step 2: Convert to fraction form
    672.33/928.09 = 578.70/x
  3. Step 3: Cross multiply
    672.33x = 928.09 × 578.70
  4. Step 4: Simplify right side
    672.33x = 537,085.68
  5. Step 5: Solve for x
    x = 537,085.68/672.33
  6. Step 6: Final answer
    x = 798.84

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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.