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Finding the Fourth Proportional to 278,713.74, 384,625.08 and 151,392

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Solution

The fourth proportional to 278,713.74, 384,625.08 and 151,392 is: 208,921.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,713.74 : 384,625.08 = 151,392 : x
  2. Step 2: Convert to fraction form
    278,713.74/384,625.08 = 151,392/x
  3. Step 3: Cross multiply
    278,713.74x = 384,625.08 × 151,392
  4. Step 4: Simplify right side
    278,713.74x = 58,229,160,111.36
  5. Step 5: Solve for x
    x = 58,229,160,111.36/278,713.74
  6. Step 6: Final answer
    x = 208,921.02

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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.