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Finding the Fourth Proportional to 876.55, 1,314.93 and 356.44

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Solution

The fourth proportional to 876.55, 1,314.93 and 356.44 is: 534.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.55 : 1,314.93 = 356.44 : x
  2. Step 2: Convert to fraction form
    876.55/1,314.93 = 356.44/x
  3. Step 3: Cross multiply
    876.55x = 1,314.93 × 356.44
  4. Step 4: Simplify right side
    876.55x = 468,693.65
  5. Step 5: Solve for x
    x = 468,693.65/876.55
  6. Step 6: Final answer
    x = 534.70

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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.