Home / 2,421.28-3,632.40-778.24

Finding the Fourth Proportional to 2,421.28, 3,632.40 and 778.24

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Solution

The fourth proportional to 2,421.28, 3,632.40 and 778.24 is: 1,167.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.28 : 3,632.40 = 778.24 : x
  2. Step 2: Convert to fraction form
    2,421.28/3,632.40 = 778.24/x
  3. Step 3: Cross multiply
    2,421.28x = 3,632.40 × 778.24
  4. Step 4: Simplify right side
    2,421.28x = 2,826,878.98
  5. Step 5: Solve for x
    x = 2,826,878.98/2,421.28
  6. Step 6: Final answer
    x = 1,167.51

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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.