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Finding the Fourth Proportional to 391,544.64, 540,409.32 and 255,600.72

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Solution

The fourth proportional to 391,544.64, 540,409.32 and 255,600.72 is: 352,779.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,544.64 : 540,409.32 = 255,600.72 : x
  2. Step 2: Convert to fraction form
    391,544.64/540,409.32 = 255,600.72/x
  3. Step 3: Cross multiply
    391,544.64x = 540,409.32 × 255,600.72
  4. Step 4: Simplify right side
    391,544.64x = 138,129,011,286.71
  5. Step 5: Solve for x
    x = 138,129,011,286.71/391,544.64
  6. Step 6: Final answer
    x = 352,779.73

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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.