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Finding the Fourth Proportional to 664,397.60, 996,466.80 and 215,009.60

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Solution

The fourth proportional to 664,397.60, 996,466.80 and 215,009.60 is: 322,472.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,397.60 : 996,466.80 = 215,009.60 : x
  2. Step 2: Convert to fraction form
    664,397.60/996,466.80 = 215,009.60/x
  3. Step 3: Cross multiply
    664,397.60x = 996,466.80 × 215,009.60
  4. Step 4: Simplify right side
    664,397.60x = 214,249,928,081.28
  5. Step 5: Solve for x
    x = 214,249,928,081.28/664,397.60
  6. Step 6: Final answer
    x = 322,472.46

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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.