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Finding the Fourth Proportional to 672.86, 928.81 and 602.80

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Solution

The fourth proportional to 672.86, 928.81 and 602.80 is: 832.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.86 : 928.81 = 602.80 : x
  2. Step 2: Convert to fraction form
    672.86/928.81 = 602.80/x
  3. Step 3: Cross multiply
    672.86x = 928.81 × 602.80
  4. Step 4: Simplify right side
    672.86x = 559,883.65
  5. Step 5: Solve for x
    x = 559,883.65/672.86
  6. Step 6: Final answer
    x = 832.10

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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.