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Finding the Fourth Proportional to 384,993.60, 531,303.36 and 215,227.20

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Solution

The fourth proportional to 384,993.60, 531,303.36 and 215,227.20 is: 297,020.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,993.60 : 531,303.36 = 215,227.20 : x
  2. Step 2: Convert to fraction form
    384,993.60/531,303.36 = 215,227.20/x
  3. Step 3: Cross multiply
    384,993.60x = 531,303.36 × 215,227.20
  4. Step 4: Simplify right side
    384,993.60x = 114,350,934,523.39
  5. Step 5: Solve for x
    x = 114,350,934,523.39/384,993.60
  6. Step 6: Final answer
    x = 297,020.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.