Home / 278,240.13-383,971.41-157,378.81

Finding the Fourth Proportional to 278,240.13, 383,971.41 and 157,378.81

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Solution

The fourth proportional to 278,240.13, 383,971.41 and 157,378.81 is: 217,182.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,240.13 : 383,971.41 = 157,378.81 : x
  2. Step 2: Convert to fraction form
    278,240.13/383,971.41 = 157,378.81/x
  3. Step 3: Cross multiply
    278,240.13x = 383,971.41 × 157,378.81
  4. Step 4: Simplify right side
    278,240.13x = 60,428,963,579.82
  5. Step 5: Solve for x
    x = 60,428,963,579.82/278,240.13
  6. Step 6: Final answer
    x = 217,182.78

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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.