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Finding the Fourth Proportional to 391,706.88, 540,356.52 and 255,820.36

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Solution

The fourth proportional to 391,706.88, 540,356.52 and 255,820.36 is: 352,902.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,706.88 : 540,356.52 = 255,820.36 : x
  2. Step 2: Convert to fraction form
    391,706.88/540,356.52 = 255,820.36/x
  3. Step 3: Cross multiply
    391,706.88x = 540,356.52 × 255,820.36
  4. Step 4: Simplify right side
    391,706.88x = 138,234,199,474.75
  5. Step 5: Solve for x
    x = 138,234,199,474.75/391,706.88
  6. Step 6: Final answer
    x = 352,902.15

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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.