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Finding the Fourth Proportional to 876.77, 1,209.94 and 483.80

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Solution

The fourth proportional to 876.77, 1,209.94 and 483.80 is: 667.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.77 : 1,209.94 = 483.80 : x
  2. Step 2: Convert to fraction form
    876.77/1,209.94 = 483.80/x
  3. Step 3: Cross multiply
    876.77x = 1,209.94 × 483.80
  4. Step 4: Simplify right side
    876.77x = 585,365.12
  5. Step 5: Solve for x
    x = 585,365.12/876.77
  6. Step 6: Final answer
    x = 667.63

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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.