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Finding the Fourth Proportional to 856.36, 1,180.62 and 731.50

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Solution

The fourth proportional to 856.36, 1,180.62 and 731.50 is: 1,008.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.36 : 1,180.62 = 731.50 : x
  2. Step 2: Convert to fraction form
    856.36/1,180.62 = 731.50/x
  3. Step 3: Cross multiply
    856.36x = 1,180.62 × 731.50
  4. Step 4: Simplify right side
    856.36x = 863,623.53
  5. Step 5: Solve for x
    x = 863,623.53/856.36
  6. Step 6: Final answer
    x = 1,008.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.