Home / 2,421.10-3,633.16-778.86

Finding the Fourth Proportional to 2,421.10, 3,633.16 and 778.86

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Solution

The fourth proportional to 2,421.10, 3,633.16 and 778.86 is: 1,168.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.10 : 3,633.16 = 778.86 : x
  2. Step 2: Convert to fraction form
    2,421.10/3,633.16 = 778.86/x
  3. Step 3: Cross multiply
    2,421.10x = 3,633.16 × 778.86
  4. Step 4: Simplify right side
    2,421.10x = 2,829,723.00
  5. Step 5: Solve for x
    x = 2,829,723.00/2,421.10
  6. Step 6: Final answer
    x = 1,168.78

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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.