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Finding the Fourth Proportional to 570,861.18, 855,672.78 and 285,864.66

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Solution

The fourth proportional to 570,861.18, 855,672.78 and 285,864.66 is: 428,487.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,861.18 : 855,672.78 = 285,864.66 : x
  2. Step 2: Convert to fraction form
    570,861.18/855,672.78 = 285,864.66/x
  3. Step 3: Cross multiply
    570,861.18x = 855,672.78 × 285,864.66
  4. Step 4: Simplify right side
    570,861.18x = 244,606,608,325.96
  5. Step 5: Solve for x
    x = 244,606,608,325.96/570,861.18
  6. Step 6: Final answer
    x = 428,487.02

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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.