Home / 3,478.95-5,220.18-1,288.17

Finding the Fourth Proportional to 3,478.95, 5,220.18 and 1,288.17

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Solution

The fourth proportional to 3,478.95, 5,220.18 and 1,288.17 is: 1,932.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.95 : 5,220.18 = 1,288.17 : x
  2. Step 2: Convert to fraction form
    3,478.95/5,220.18 = 1,288.17/x
  3. Step 3: Cross multiply
    3,478.95x = 5,220.18 × 1,288.17
  4. Step 4: Simplify right side
    3,478.95x = 6,724,479.27
  5. Step 5: Solve for x
    x = 6,724,479.27/3,478.95
  6. Step 6: Final answer
    x = 1,932.90

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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.