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Finding the Fourth Proportional to 876.31, 1,209.26 and 483.32

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Solution

The fourth proportional to 876.31, 1,209.26 and 483.32 is: 666.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.31 : 1,209.26 = 483.32 : x
  2. Step 2: Convert to fraction form
    876.31/1,209.26 = 483.32/x
  3. Step 3: Cross multiply
    876.31x = 1,209.26 × 483.32
  4. Step 4: Simplify right side
    876.31x = 584,459.54
  5. Step 5: Solve for x
    x = 584,459.54/876.31
  6. Step 6: Final answer
    x = 666.96

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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.