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Finding the Fourth Proportional to 876.78, 1,313.55 and 382.08

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Solution

The fourth proportional to 876.78, 1,313.55 and 382.08 is: 572.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.78 : 1,313.55 = 382.08 : x
  2. Step 2: Convert to fraction form
    876.78/1,313.55 = 382.08/x
  3. Step 3: Cross multiply
    876.78x = 1,313.55 × 382.08
  4. Step 4: Simplify right side
    876.78x = 501,881.18
  5. Step 5: Solve for x
    x = 501,881.18/876.78
  6. Step 6: Final answer
    x = 572.41

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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.