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Finding the Fourth Proportional to 278,763.96, 384,694.72 and 151,439.66

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Solution

The fourth proportional to 278,763.96, 384,694.72 and 151,439.66 is: 208,986.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,763.96 : 384,694.72 = 151,439.66 : x
  2. Step 2: Convert to fraction form
    278,763.96/384,694.72 = 151,439.66/x
  3. Step 3: Cross multiply
    278,763.96x = 384,694.72 × 151,439.66
  4. Step 4: Simplify right side
    278,763.96x = 58,258,037,600.60
  5. Step 5: Solve for x
    x = 58,258,037,600.60/278,763.96
  6. Step 6: Final answer
    x = 208,986.98

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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.