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Finding the Fourth Proportional to 664,401.60, 996,472.80 and 215,013.60

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Solution

The fourth proportional to 664,401.60, 996,472.80 and 215,013.60 is: 322,478.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,401.60 : 996,472.80 = 215,013.60 : x
  2. Step 2: Convert to fraction form
    664,401.60/996,472.80 = 215,013.60/x
  3. Step 3: Cross multiply
    664,401.60x = 996,472.80 × 215,013.60
  4. Step 4: Simplify right side
    664,401.60x = 214,255,204,030.08
  5. Step 5: Solve for x
    x = 214,255,204,030.08/664,401.60
  6. Step 6: Final answer
    x = 322,478.46

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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.