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Finding the Fourth Proportional to 353,120.80, 528,903.60 and 313,722.40

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Solution

The fourth proportional to 353,120.80, 528,903.60 and 313,722.40 is: 469,892.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,120.80 : 528,903.60 = 313,722.40 : x
  2. Step 2: Convert to fraction form
    353,120.80/528,903.60 = 313,722.40/x
  3. Step 3: Cross multiply
    353,120.80x = 528,903.60 × 313,722.40
  4. Step 4: Simplify right side
    353,120.80x = 165,928,906,760.64
  5. Step 5: Solve for x
    x = 165,928,906,760.64/353,120.80
  6. Step 6: Final answer
    x = 469,892.76

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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.