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Finding the Fourth Proportional to 518,289.96, 775,679.40 and 318,736.92

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Solution

The fourth proportional to 518,289.96, 775,679.40 and 318,736.92 is: 477,025.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,289.96 : 775,679.40 = 318,736.92 : x
  2. Step 2: Convert to fraction form
    518,289.96/775,679.40 = 318,736.92/x
  3. Step 3: Cross multiply
    518,289.96x = 775,679.40 × 318,736.92
  4. Step 4: Simplify right side
    518,289.96x = 247,237,662,863.45
  5. Step 5: Solve for x
    x = 247,237,662,863.45/518,289.96
  6. Step 6: Final answer
    x = 477,025.76

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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.