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Finding the Fourth Proportional to 876.99, 1,313.46 and 762.39

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Solution

The fourth proportional to 876.99, 1,313.46 and 762.39 is: 1,141.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.99 : 1,313.46 = 762.39 : x
  2. Step 2: Convert to fraction form
    876.99/1,313.46 = 762.39/x
  3. Step 3: Cross multiply
    876.99x = 1,313.46 × 762.39
  4. Step 4: Simplify right side
    876.99x = 1,001,368.77
  5. Step 5: Solve for x
    x = 1,001,368.77/876.99
  6. Step 6: Final answer
    x = 1,141.82

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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.