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Finding the Fourth Proportional to 575.28, 861.40 and 483.28

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Solution

The fourth proportional to 575.28, 861.40 and 483.28 is: 723.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.28 : 861.40 = 483.28 : x
  2. Step 2: Convert to fraction form
    575.28/861.40 = 483.28/x
  3. Step 3: Cross multiply
    575.28x = 861.40 × 483.28
  4. Step 4: Simplify right side
    575.28x = 416,297.39
  5. Step 5: Solve for x
    x = 416,297.39/575.28
  6. Step 6: Final answer
    x = 723.64

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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.