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Finding the Fourth Proportional to 1,057.40, 1,586.34 and 440.99

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Solution

The fourth proportional to 1,057.40, 1,586.34 and 440.99 is: 661.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.40 : 1,586.34 = 440.99 : x
  2. Step 2: Convert to fraction form
    1,057.40/1,586.34 = 440.99/x
  3. Step 3: Cross multiply
    1,057.40x = 1,586.34 × 440.99
  4. Step 4: Simplify right side
    1,057.40x = 699,560.08
  5. Step 5: Solve for x
    x = 699,560.08/1,057.40
  6. Step 6: Final answer
    x = 661.59

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Double scale
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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.