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Finding the Fourth Proportional to 570,378.38, 856,408.65 and 318,151.67

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Solution

The fourth proportional to 570,378.38, 856,408.65 and 318,151.67 is: 477,696.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,378.38 : 856,408.65 = 318,151.67 : x
  2. Step 2: Convert to fraction form
    570,378.38/856,408.65 = 318,151.67/x
  3. Step 3: Cross multiply
    570,378.38x = 856,408.65 × 318,151.67
  4. Step 4: Simplify right side
    570,378.38x = 272,467,836,724.83
  5. Step 5: Solve for x
    x = 272,467,836,724.83/570,378.38
  6. Step 6: Final answer
    x = 477,696.65

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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.