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Finding the Fourth Proportional to 518,212.55, 775,563.15 and 318,659.33

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Solution

The fourth proportional to 518,212.55, 775,563.15 and 318,659.33 is: 476,909.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,212.55 : 775,563.15 = 318,659.33 : x
  2. Step 2: Convert to fraction form
    518,212.55/775,563.15 = 318,659.33/x
  3. Step 3: Cross multiply
    518,212.55x = 775,563.15 × 318,659.33
  4. Step 4: Simplify right side
    518,212.55x = 247,140,433,751.69
  5. Step 5: Solve for x
    x = 247,140,433,751.69/518,212.55
  6. Step 6: Final answer
    x = 476,909.40

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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.