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Finding the Fourth Proportional to 664,707.63, 996,848.20 and 215,320.15

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Solution

The fourth proportional to 664,707.63, 996,848.20 and 215,320.15 is: 322,911.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,707.63 : 996,848.20 = 215,320.15 : x
  2. Step 2: Convert to fraction form
    664,707.63/996,848.20 = 215,320.15/x
  3. Step 3: Cross multiply
    664,707.63x = 996,848.20 × 215,320.15
  4. Step 4: Simplify right side
    664,707.63x = 214,641,503,951.23
  5. Step 5: Solve for x
    x = 214,641,503,951.23/664,707.63
  6. Step 6: Final answer
    x = 322,911.15

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1.5x scale

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.