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Finding the Fourth Proportional to 890.32, 1,228.08 and 743.62

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Solution

The fourth proportional to 890.32, 1,228.08 and 743.62 is: 1,025.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.32 : 1,228.08 = 743.62 : x
  2. Step 2: Convert to fraction form
    890.32/1,228.08 = 743.62/x
  3. Step 3: Cross multiply
    890.32x = 1,228.08 × 743.62
  4. Step 4: Simplify right side
    890.32x = 913,224.85
  5. Step 5: Solve for x
    x = 913,224.85/890.32
  6. Step 6: Final answer
    x = 1,025.73

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1.5x scale

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.