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Finding the Fourth Proportional to 278,778.90, 384,722.80 and 151,462.28

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Solution

The fourth proportional to 278,778.90, 384,722.80 and 151,462.28 is: 209,022.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,778.90 : 384,722.80 = 151,462.28 : x
  2. Step 2: Convert to fraction form
    278,778.90/384,722.80 = 151,462.28/x
  3. Step 3: Cross multiply
    278,778.90x = 384,722.80 × 151,462.28
  4. Step 4: Simplify right side
    278,778.90x = 58,270,992,455.98
  5. Step 5: Solve for x
    x = 58,270,992,455.98/278,778.90
  6. Step 6: Final answer
    x = 209,022.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.