Home / 2,778.02-4,167.30-928.70

Finding the Fourth Proportional to 2,778.02, 4,167.30 and 928.70

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Solution

The fourth proportional to 2,778.02, 4,167.30 and 928.70 is: 1,393.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.02 : 4,167.30 = 928.70 : x
  2. Step 2: Convert to fraction form
    2,778.02/4,167.30 = 928.70/x
  3. Step 3: Cross multiply
    2,778.02x = 4,167.30 × 928.70
  4. Step 4: Simplify right side
    2,778.02x = 3,870,171.51
  5. Step 5: Solve for x
    x = 3,870,171.51/2,778.02
  6. Step 6: Final answer
    x = 1,393.14

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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.