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Finding the Fourth Proportional to 520,720.12, 780,799.20 and 236,255.42

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Solution

The fourth proportional to 520,720.12, 780,799.20 and 236,255.42 is: 354,255.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,720.12 : 780,799.20 = 236,255.42 : x
  2. Step 2: Convert to fraction form
    520,720.12/780,799.20 = 236,255.42/x
  3. Step 3: Cross multiply
    520,720.12x = 780,799.20 × 236,255.42
  4. Step 4: Simplify right side
    520,720.12x = 184,468,042,931.66
  5. Step 5: Solve for x
    x = 184,468,042,931.66/520,720.12
  6. Step 6: Final answer
    x = 354,255.65

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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.