Home / 2,778.50-4,168.08-929.19

Finding the Fourth Proportional to 2,778.50, 4,168.08 and 929.19

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Solution

The fourth proportional to 2,778.50, 4,168.08 and 929.19 is: 1,393.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.50 : 4,168.08 = 929.19 : x
  2. Step 2: Convert to fraction form
    2,778.50/4,168.08 = 929.19/x
  3. Step 3: Cross multiply
    2,778.50x = 4,168.08 × 929.19
  4. Step 4: Simplify right side
    2,778.50x = 3,872,953.89
  5. Step 5: Solve for x
    x = 3,872,953.89/2,778.50
  6. Step 6: Final answer
    x = 1,393.90

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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.