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Finding the Fourth Proportional to 664,807.40, 997,219.20 and 215,524.70

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Solution

The fourth proportional to 664,807.40, 997,219.20 and 215,524.70 is: 323,289.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,807.40 : 997,219.20 = 215,524.70 : x
  2. Step 2: Convert to fraction form
    664,807.40/997,219.20 = 215,524.70/x
  3. Step 3: Cross multiply
    664,807.40x = 997,219.20 × 215,524.70
  4. Step 4: Simplify right side
    664,807.40x = 214,925,368,914.24
  5. Step 5: Solve for x
    x = 214,925,368,914.24/664,807.40
  6. Step 6: Final answer
    x = 323,289.68

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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.