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Finding the Fourth Proportional to 874.96, 1,312.20 and 441.92

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Solution

The fourth proportional to 874.96, 1,312.20 and 441.92 is: 662.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.96 : 1,312.20 = 441.92 : x
  2. Step 2: Convert to fraction form
    874.96/1,312.20 = 441.92/x
  3. Step 3: Cross multiply
    874.96x = 1,312.20 × 441.92
  4. Step 4: Simplify right side
    874.96x = 579,887.42
  5. Step 5: Solve for x
    x = 579,887.42/874.96
  6. Step 6: Final answer
    x = 662.76

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1.5x scale

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.