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Finding the Fourth Proportional to 917.87, 1,376.06 and 332.78

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Solution

The fourth proportional to 917.87, 1,376.06 and 332.78 is: 498.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.87 : 1,376.06 = 332.78 : x
  2. Step 2: Convert to fraction form
    917.87/1,376.06 = 332.78/x
  3. Step 3: Cross multiply
    917.87x = 1,376.06 × 332.78
  4. Step 4: Simplify right side
    917.87x = 457,919.20
  5. Step 5: Solve for x
    x = 457,919.20/917.87
  6. Step 6: Final answer
    x = 498.90

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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.