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Finding the Fourth Proportional to 353,138.40, 529,707.60 and 313,480.80

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Solution

The fourth proportional to 353,138.40, 529,707.60 and 313,480.80 is: 470,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,138.40 : 529,707.60 = 313,480.80 : x
  2. Step 2: Convert to fraction form
    353,138.40/529,707.60 = 313,480.80/x
  3. Step 3: Cross multiply
    353,138.40x = 529,707.60 × 313,480.80
  4. Step 4: Simplify right side
    353,138.40x = 166,053,162,214.08
  5. Step 5: Solve for x
    x = 166,053,162,214.08/353,138.40
  6. Step 6: Final answer
    x = 470,221.20

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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.