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Finding the Fourth Proportional to 391,327.20, 540,043.20 and 248,054.40

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Solution

The fourth proportional to 391,327.20, 540,043.20 and 248,054.40 is: 342,322.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,327.20 : 540,043.20 = 248,054.40 : x
  2. Step 2: Convert to fraction form
    391,327.20/540,043.20 = 248,054.40/x
  3. Step 3: Cross multiply
    391,327.20x = 540,043.20 × 248,054.40
  4. Step 4: Simplify right side
    391,327.20x = 133,960,091,950.08
  5. Step 5: Solve for x
    x = 133,960,091,950.08/391,327.20
  6. Step 6: Final answer
    x = 342,322.47

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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.