Home / 278,778.09-384,721.63-157,919.34

Finding the Fourth Proportional to 278,778.09, 384,721.63 and 157,919.34

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Solution

The fourth proportional to 278,778.09, 384,721.63 and 157,919.34 is: 217,933.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,778.09 : 384,721.63 = 157,919.34 : x
  2. Step 2: Convert to fraction form
    278,778.09/384,721.63 = 157,919.34/x
  3. Step 3: Cross multiply
    278,778.09x = 384,721.63 × 157,919.34
  4. Step 4: Simplify right side
    278,778.09x = 60,754,985,665.47
  5. Step 5: Solve for x
    x = 60,754,985,665.47/278,778.09
  6. Step 6: Final answer
    x = 217,933.15

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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.