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Finding the Fourth Proportional to 518,280.21, 775,664.78 and 318,727.17

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Solution

The fourth proportional to 518,280.21, 775,664.78 and 318,727.17 is: 477,011.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,280.21 : 775,664.78 = 318,727.17 : x
  2. Step 2: Convert to fraction form
    518,280.21/775,664.78 = 318,727.17/x
  3. Step 3: Cross multiply
    518,280.21x = 775,664.78 × 318,727.17
  4. Step 4: Simplify right side
    518,280.21x = 247,225,438,604.44
  5. Step 5: Solve for x
    x = 247,225,438,604.44/518,280.21
  6. Step 6: Final answer
    x = 477,011.15

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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.