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Finding the Fourth Proportional to 278,403.01, 384,197.15 and 151,078.57

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Solution

The fourth proportional to 278,403.01, 384,197.15 and 151,078.57 is: 208,488.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,403.01 : 384,197.15 = 151,078.57 : x
  2. Step 2: Convert to fraction form
    278,403.01/384,197.15 = 151,078.57/x
  3. Step 3: Cross multiply
    278,403.01x = 384,197.15 × 151,078.57
  4. Step 4: Simplify right side
    278,403.01x = 58,043,955,437.28
  5. Step 5: Solve for x
    x = 58,043,955,437.28/278,403.01
  6. Step 6: Final answer
    x = 208,488.97

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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.