Home / 5,176.31-7,764.64-1,280.72

Finding the Fourth Proportional to 5,176.31, 7,764.64 and 1,280.72

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Solution

The fourth proportional to 5,176.31, 7,764.64 and 1,280.72 is: 1,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,176.31 : 7,764.64 = 1,280.72 : x
  2. Step 2: Convert to fraction form
    5,176.31/7,764.64 = 1,280.72/x
  3. Step 3: Cross multiply
    5,176.31x = 7,764.64 × 1,280.72
  4. Step 4: Simplify right side
    5,176.31x = 9,944,345.95
  5. Step 5: Solve for x
    x = 9,944,345.95/5,176.31
  6. Step 6: Final answer
    x = 1,921.13

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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.