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Finding the Fourth Proportional to 1,039.44, 1,559.15 and 423.00

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Solution

The fourth proportional to 1,039.44, 1,559.15 and 423.00 is: 634.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.44 : 1,559.15 = 423.00 : x
  2. Step 2: Convert to fraction form
    1,039.44/1,559.15 = 423.00/x
  3. Step 3: Cross multiply
    1,039.44x = 1,559.15 × 423.00
  4. Step 4: Simplify right side
    1,039.44x = 659,512.65
  5. Step 5: Solve for x
    x = 659,512.65/1,039.44
  6. Step 6: Final answer
    x = 634.49

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.