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Finding the Fourth Proportional to 390,960.60, 587,693.70 and 363,226.20

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Solution

The fourth proportional to 390,960.60, 587,693.70 and 363,226.20 is: 546,003.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,960.60 : 587,693.70 = 363,226.20 : x
  2. Step 2: Convert to fraction form
    390,960.60/587,693.70 = 363,226.20/x
  3. Step 3: Cross multiply
    390,960.60x = 587,693.70 × 363,226.20
  4. Step 4: Simplify right side
    390,960.60x = 213,465,749,414.94
  5. Step 5: Solve for x
    x = 213,465,749,414.94/390,960.60
  6. Step 6: Final answer
    x = 546,003.23

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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.