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Finding the Fourth Proportional to 571,394.18, 856,339.29 and 318,793.61

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Solution

The fourth proportional to 571,394.18, 856,339.29 and 318,793.61 is: 477,770.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,394.18 : 856,339.29 = 318,793.61 : x
  2. Step 2: Convert to fraction form
    571,394.18/856,339.29 = 318,793.61/x
  3. Step 3: Cross multiply
    571,394.18x = 856,339.29 × 318,793.61
  4. Step 4: Simplify right side
    571,394.18x = 272,995,490,967.88
  5. Step 5: Solve for x
    x = 272,995,490,967.88/571,394.18
  6. Step 6: Final answer
    x = 477,770.86

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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.