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Finding the Fourth Proportional to 570,391.57, 856,428.42 and 318,164.86

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Solution

The fourth proportional to 570,391.57, 856,428.42 and 318,164.86 is: 477,716.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,391.57 : 856,428.42 = 318,164.86 : x
  2. Step 2: Convert to fraction form
    570,391.57/856,428.42 = 318,164.86/x
  3. Step 3: Cross multiply
    570,391.57x = 856,428.42 × 318,164.86
  4. Step 4: Simplify right side
    570,391.57x = 272,485,428,349.32
  5. Step 5: Solve for x
    x = 272,485,428,349.32/570,391.57
  6. Step 6: Final answer
    x = 477,716.44

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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.