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Finding the Fourth Proportional to 278,765.55, 384,677.51 and 151,438.41

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Solution

The fourth proportional to 278,765.55, 384,677.51 and 151,438.41 is: 208,974.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,765.55 : 384,677.51 = 151,438.41 : x
  2. Step 2: Convert to fraction form
    278,765.55/384,677.51 = 151,438.41/x
  3. Step 3: Cross multiply
    278,765.55x = 384,677.51 × 151,438.41
  4. Step 4: Simplify right side
    278,765.55x = 58,254,949,719.97
  5. Step 5: Solve for x
    x = 58,254,949,719.97/278,765.55
  6. Step 6: Final answer
    x = 208,974.71

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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.