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Finding the Fourth Proportional to 578.70, 869.00 and 549.47

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Solution

The fourth proportional to 578.70, 869.00 and 549.47 is: 825.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.70 : 869.00 = 549.47 : x
  2. Step 2: Convert to fraction form
    578.70/869.00 = 549.47/x
  3. Step 3: Cross multiply
    578.70x = 869.00 × 549.47
  4. Step 4: Simplify right side
    578.70x = 477,482.34
  5. Step 5: Solve for x
    x = 477,482.34/578.70
  6. Step 6: Final answer
    x = 825.09

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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.