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Finding the Fourth Proportional to 954.32, 1,431.88 and 917.06

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Solution

The fourth proportional to 954.32, 1,431.88 and 917.06 is: 1,375.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.32 : 1,431.88 = 917.06 : x
  2. Step 2: Convert to fraction form
    954.32/1,431.88 = 917.06/x
  3. Step 3: Cross multiply
    954.32x = 1,431.88 × 917.06
  4. Step 4: Simplify right side
    954.32x = 1,313,119.87
  5. Step 5: Solve for x
    x = 1,313,119.87/954.32
  6. Step 6: Final answer
    x = 1,375.97

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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.