Home / 1,278.85-1,917.98-498.87

Finding the Fourth Proportional to 1,278.85, 1,917.98 and 498.87

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Solution

The fourth proportional to 1,278.85, 1,917.98 and 498.87 is: 748.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.85 : 1,917.98 = 498.87 : x
  2. Step 2: Convert to fraction form
    1,278.85/1,917.98 = 498.87/x
  3. Step 3: Cross multiply
    1,278.85x = 1,917.98 × 498.87
  4. Step 4: Simplify right side
    1,278.85x = 956,822.68
  5. Step 5: Solve for x
    x = 956,822.68/1,278.85
  6. Step 6: Final answer
    x = 748.19

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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.