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Finding the Fourth Proportional to 876.10, 1,209.10 and 483.18

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Solution

The fourth proportional to 876.10, 1,209.10 and 483.18 is: 666.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.10 : 1,209.10 = 483.18 : x
  2. Step 2: Convert to fraction form
    876.10/1,209.10 = 483.18/x
  3. Step 3: Cross multiply
    876.10x = 1,209.10 × 483.18
  4. Step 4: Simplify right side
    876.10x = 584,212.94
  5. Step 5: Solve for x
    x = 584,212.94/876.10
  6. Step 6: Final answer
    x = 666.83

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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.