Home / 2,319.78-3,479.31-1,087.08

Finding the Fourth Proportional to 2,319.78, 3,479.31 and 1,087.08

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Solution

The fourth proportional to 2,319.78, 3,479.31 and 1,087.08 is: 1,630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,319.78 : 3,479.31 = 1,087.08 : x
  2. Step 2: Convert to fraction form
    2,319.78/3,479.31 = 1,087.08/x
  3. Step 3: Cross multiply
    2,319.78x = 3,479.31 × 1,087.08
  4. Step 4: Simplify right side
    2,319.78x = 3,782,288.31
  5. Step 5: Solve for x
    x = 3,782,288.31/2,319.78
  6. Step 6: Final answer
    x = 1,630.45

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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.