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Finding the Fourth Proportional to 278,713.71, 384,623.24 and 151,388.19

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Solution

The fourth proportional to 278,713.71, 384,623.24 and 151,388.19 is: 208,914.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,713.71 : 384,623.24 = 151,388.19 : x
  2. Step 2: Convert to fraction form
    278,713.71/384,623.24 = 151,388.19/x
  3. Step 3: Cross multiply
    278,713.71x = 384,623.24 × 151,388.19
  4. Step 4: Simplify right side
    278,713.71x = 58,227,415,378.59
  5. Step 5: Solve for x
    x = 58,227,415,378.59/278,713.71
  6. Step 6: Final answer
    x = 208,914.79

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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.