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Finding the Fourth Proportional to 672.04, 1,008.80 and 569.80

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Solution

The fourth proportional to 672.04, 1,008.80 and 569.80 is: 855.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.04 : 1,008.80 = 569.80 : x
  2. Step 2: Convert to fraction form
    672.04/1,008.80 = 569.80/x
  3. Step 3: Cross multiply
    672.04x = 1,008.80 × 569.80
  4. Step 4: Simplify right side
    672.04x = 574,814.24
  5. Step 5: Solve for x
    x = 574,814.24/672.04
  6. Step 6: Final answer
    x = 855.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.