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Finding the Fourth Proportional to 570,388.38, 856,423.64 and 318,161.67

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Solution

The fourth proportional to 570,388.38, 856,423.64 and 318,161.67 is: 477,711.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,388.38 : 856,423.64 = 318,161.67 : x
  2. Step 2: Convert to fraction form
    570,388.38/856,423.64 = 318,161.67/x
  3. Step 3: Cross multiply
    570,388.38x = 856,423.64 × 318,161.67
  4. Step 4: Simplify right side
    570,388.38x = 272,481,175,529.88
  5. Step 5: Solve for x
    x = 272,481,175,529.88/570,388.38
  6. Step 6: Final answer
    x = 477,711.65

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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.