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Finding the Fourth Proportional to 520,115.40, 780,432.30 and 295,648.20

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Solution

The fourth proportional to 520,115.40, 780,432.30 and 295,648.20 is: 443,619.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,115.40 : 780,432.30 = 295,648.20 : x
  2. Step 2: Convert to fraction form
    520,115.40/780,432.30 = 295,648.20/x
  3. Step 3: Cross multiply
    520,115.40x = 780,432.30 × 295,648.20
  4. Step 4: Simplify right side
    520,115.40x = 230,733,404,716.86
  5. Step 5: Solve for x
    x = 230,733,404,716.86/520,115.40
  6. Step 6: Final answer
    x = 443,619.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.