Home / 2,278.34-3,417.72-979.51

Finding the Fourth Proportional to 2,278.34, 3,417.72 and 979.51

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Solution

The fourth proportional to 2,278.34, 3,417.72 and 979.51 is: 1,469.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.34 : 3,417.72 = 979.51 : x
  2. Step 2: Convert to fraction form
    2,278.34/3,417.72 = 979.51/x
  3. Step 3: Cross multiply
    2,278.34x = 3,417.72 × 979.51
  4. Step 4: Simplify right side
    2,278.34x = 3,347,690.92
  5. Step 5: Solve for x
    x = 3,347,690.92/2,278.34
  6. Step 6: Final answer
    x = 1,469.36

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1.5x scale

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.