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Finding the Fourth Proportional to 1,594.56, 2,388.50 and 812.20

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Solution

The fourth proportional to 1,594.56, 2,388.50 and 812.20 is: 1,216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,594.56 : 2,388.50 = 812.20 : x
  2. Step 2: Convert to fraction form
    1,594.56/2,388.50 = 812.20/x
  3. Step 3: Cross multiply
    1,594.56x = 2,388.50 × 812.20
  4. Step 4: Simplify right side
    1,594.56x = 1,939,939.70
  5. Step 5: Solve for x
    x = 1,939,939.70/1,594.56
  6. Step 6: Final answer
    x = 1,216.60

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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.