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Finding the Fourth Proportional to 250,657.20, 345,904.56 and 137,480.40

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Solution

The fourth proportional to 250,657.20, 345,904.56 and 137,480.40 is: 189,721.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,657.20 : 345,904.56 = 137,480.40 : x
  2. Step 2: Convert to fraction form
    250,657.20/345,904.56 = 137,480.40/x
  3. Step 3: Cross multiply
    250,657.20x = 345,904.56 × 137,480.40
  4. Step 4: Simplify right side
    250,657.20x = 47,555,097,270.62
  5. Step 5: Solve for x
    x = 47,555,097,270.62/250,657.20
  6. Step 6: Final answer
    x = 189,721.65

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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.