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Finding the Fourth Proportional to 318,454.91, 477,762.55 and 118,781.81

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Solution

The fourth proportional to 318,454.91, 477,762.55 and 118,781.81 is: 178,202.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,454.91 : 477,762.55 = 118,781.81 : x
  2. Step 2: Convert to fraction form
    318,454.91/477,762.55 = 118,781.81/x
  3. Step 3: Cross multiply
    318,454.91x = 477,762.55 × 118,781.81
  4. Step 4: Simplify right side
    318,454.91x = 56,749,497,753.45
  5. Step 5: Solve for x
    x = 56,749,497,753.45/318,454.91
  6. Step 6: Final answer
    x = 178,202.62

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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.