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Finding the Fourth Proportional to 572.19, 858.29 and 280.19

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Solution

The fourth proportional to 572.19, 858.29 and 280.19 is: 420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.19 : 858.29 = 280.19 : x
  2. Step 2: Convert to fraction form
    572.19/858.29 = 280.19/x
  3. Step 3: Cross multiply
    572.19x = 858.29 × 280.19
  4. Step 4: Simplify right side
    572.19x = 240,478.58
  5. Step 5: Solve for x
    x = 240,478.58/572.19
  6. Step 6: Final answer
    x = 420.28

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Similar ratio
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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.