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Finding the Fourth Proportional to 876.88, 1,312.49 and 481.00

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Solution

The fourth proportional to 876.88, 1,312.49 and 481.00 is: 719.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.88 : 1,312.49 = 481.00 : x
  2. Step 2: Convert to fraction form
    876.88/1,312.49 = 481.00/x
  3. Step 3: Cross multiply
    876.88x = 1,312.49 × 481.00
  4. Step 4: Simplify right side
    876.88x = 631,298.72
  5. Step 5: Solve for x
    x = 631,298.72/876.88
  6. Step 6: Final answer
    x = 719.94

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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.