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Finding the Fourth Proportional to 664,804.40, 997,214.70 and 215,521.70

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Solution

The fourth proportional to 664,804.40, 997,214.70 and 215,521.70 is: 323,285.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,804.40 : 997,214.70 = 215,521.70 : x
  2. Step 2: Convert to fraction form
    664,804.40/997,214.70 = 215,521.70/x
  3. Step 3: Cross multiply
    664,804.40x = 997,214.70 × 215,521.70
  4. Step 4: Simplify right side
    664,804.40x = 214,921,407,408.99
  5. Step 5: Solve for x
    x = 214,921,407,408.99/664,804.40
  6. Step 6: Final answer
    x = 323,285.18

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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.