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Finding the Fourth Proportional to 570,391.88, 856,428.89 and 318,165.17

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Solution

The fourth proportional to 570,391.88, 856,428.89 and 318,165.17 is: 477,716.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,391.88 : 856,428.89 = 318,165.17 : x
  2. Step 2: Convert to fraction form
    570,391.88/856,428.89 = 318,165.17/x
  3. Step 3: Cross multiply
    570,391.88x = 856,428.89 × 318,165.17
  4. Step 4: Simplify right side
    570,391.88x = 272,485,837,506.79
  5. Step 5: Solve for x
    x = 272,485,837,506.79/570,391.88
  6. Step 6: Final answer
    x = 477,716.90

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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.