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Finding the Fourth Proportional to 873.65, 1,310.27 and 310.85

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Solution

The fourth proportional to 873.65, 1,310.27 and 310.85 is: 466.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.65 : 1,310.27 = 310.85 : x
  2. Step 2: Convert to fraction form
    873.65/1,310.27 = 310.85/x
  3. Step 3: Cross multiply
    873.65x = 1,310.27 × 310.85
  4. Step 4: Simplify right side
    873.65x = 407,289.32
  5. Step 5: Solve for x
    x = 407,289.32/873.65
  6. Step 6: Final answer
    x = 466.20

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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.