Home / 278,479.20-384,235.41-157,620.47

Finding the Fourth Proportional to 278,479.20, 384,235.41 and 157,620.47

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Solution

The fourth proportional to 278,479.20, 384,235.41 and 157,620.47 is: 217,478.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,479.20 : 384,235.41 = 157,620.47 : x
  2. Step 2: Convert to fraction form
    278,479.20/384,235.41 = 157,620.47/x
  3. Step 3: Cross multiply
    278,479.20x = 384,235.41 × 157,620.47
  4. Step 4: Simplify right side
    278,479.20x = 60,563,365,914.84
  5. Step 5: Solve for x
    x = 60,563,365,914.84/278,479.20
  6. Step 6: Final answer
    x = 217,478.96

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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.