Home / 1,219.87-1,828.66-397.57

Finding the Fourth Proportional to 1,219.87, 1,828.66 and 397.57

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Solution

The fourth proportional to 1,219.87, 1,828.66 and 397.57 is: 595.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.87 : 1,828.66 = 397.57 : x
  2. Step 2: Convert to fraction form
    1,219.87/1,828.66 = 397.57/x
  3. Step 3: Cross multiply
    1,219.87x = 1,828.66 × 397.57
  4. Step 4: Simplify right side
    1,219.87x = 727,020.36
  5. Step 5: Solve for x
    x = 727,020.36/1,219.87
  6. Step 6: Final answer
    x = 595.98

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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.