Home / 378,138.16-521,834.16-208,378.36

Finding the Fourth Proportional to 378,138.16, 521,834.16 and 208,378.36

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Solution

The fourth proportional to 378,138.16, 521,834.16 and 208,378.36 is: 287,564.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,138.16 : 521,834.16 = 208,378.36 : x
  2. Step 2: Convert to fraction form
    378,138.16/521,834.16 = 208,378.36/x
  3. Step 3: Cross multiply
    378,138.16x = 521,834.16 × 208,378.36
  4. Step 4: Simplify right side
    378,138.16x = 108,738,946,452.78
  5. Step 5: Solve for x
    x = 108,738,946,452.78/378,138.16
  6. Step 6: Final answer
    x = 287,564.07

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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.