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Finding the Fourth Proportional to 391,377.92, 540,108.80 and 221,611.52

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Solution

The fourth proportional to 391,377.92, 540,108.80 and 221,611.52 is: 305,828.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,377.92 : 540,108.80 = 221,611.52 : x
  2. Step 2: Convert to fraction form
    391,377.92/540,108.80 = 221,611.52/x
  3. Step 3: Cross multiply
    391,377.92x = 540,108.80 × 221,611.52
  4. Step 4: Simplify right side
    391,377.92x = 119,694,332,133.38
  5. Step 5: Solve for x
    x = 119,694,332,133.38/391,377.92
  6. Step 6: Final answer
    x = 305,828.01

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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.