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Finding the Fourth Proportional to 391,440.18, 540,447.68 and 300,633.90

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Solution

The fourth proportional to 391,440.18, 540,447.68 and 300,633.90 is: 415,074.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,440.18 : 540,447.68 = 300,633.90 : x
  2. Step 2: Convert to fraction form
    391,440.18/540,447.68 = 300,633.90/x
  3. Step 3: Cross multiply
    391,440.18x = 540,447.68 × 300,633.90
  4. Step 4: Simplify right side
    391,440.18x = 162,476,892,509.26
  5. Step 5: Solve for x
    x = 162,476,892,509.26/391,440.18
  6. Step 6: Final answer
    x = 415,074.64

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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.