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Finding the Fourth Proportional to 389,774.55, 585,153.90 and 210,003.15

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Solution

The fourth proportional to 389,774.55, 585,153.90 and 210,003.15 is: 315,269.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,774.55 : 585,153.90 = 210,003.15 : x
  2. Step 2: Convert to fraction form
    389,774.55/585,153.90 = 210,003.15/x
  3. Step 3: Cross multiply
    389,774.55x = 585,153.90 × 210,003.15
  4. Step 4: Simplify right side
    389,774.55x = 122,884,162,234.79
  5. Step 5: Solve for x
    x = 122,884,162,234.79/389,774.55
  6. Step 6: Final answer
    x = 315,269.85

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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.