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Finding the Fourth Proportional to 873.14, 1,308.45 and 667.04

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Solution

The fourth proportional to 873.14, 1,308.45 and 667.04 is: 999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.14 : 1,308.45 = 667.04 : x
  2. Step 2: Convert to fraction form
    873.14/1,308.45 = 667.04/x
  3. Step 3: Cross multiply
    873.14x = 1,308.45 × 667.04
  4. Step 4: Simplify right side
    873.14x = 872,788.49
  5. Step 5: Solve for x
    x = 872,788.49/873.14
  6. Step 6: Final answer
    x = 999.60

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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.