Home / 1,493.20-2,239.75-397.64

Finding the Fourth Proportional to 1,493.20, 2,239.75 and 397.64

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Solution

The fourth proportional to 1,493.20, 2,239.75 and 397.64 is: 596.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,493.20 : 2,239.75 = 397.64 : x
  2. Step 2: Convert to fraction form
    1,493.20/2,239.75 = 397.64/x
  3. Step 3: Cross multiply
    1,493.20x = 2,239.75 × 397.64
  4. Step 4: Simplify right side
    1,493.20x = 890,614.19
  5. Step 5: Solve for x
    x = 890,614.19/1,493.20
  6. Step 6: Final answer
    x = 596.45

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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.