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Finding the Fourth Proportional to 391,722.06, 540,377.46 and 255,835.54

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Solution

The fourth proportional to 391,722.06, 540,377.46 and 255,835.54 is: 352,923.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,722.06 : 540,377.46 = 255,835.54 : x
  2. Step 2: Convert to fraction form
    391,722.06/540,377.46 = 255,835.54/x
  3. Step 3: Cross multiply
    391,722.06x = 540,377.46 × 255,835.54
  4. Step 4: Simplify right side
    391,722.06x = 138,247,759,282.93
  5. Step 5: Solve for x
    x = 138,247,759,282.93/391,722.06
  6. Step 6: Final answer
    x = 352,923.09

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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.