Home / 378,721.45-522,635.31-208,955.57

Finding the Fourth Proportional to 378,721.45, 522,635.31 and 208,955.57

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Solution

The fourth proportional to 378,721.45, 522,635.31 and 208,955.57 is: 288,358.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,721.45 : 522,635.31 = 208,955.57 : x
  2. Step 2: Convert to fraction form
    378,721.45/522,635.31 = 208,955.57/x
  3. Step 3: Cross multiply
    378,721.45x = 522,635.31 × 208,955.57
  4. Step 4: Simplify right side
    378,721.45x = 109,207,559,103.18
  5. Step 5: Solve for x
    x = 109,207,559,103.18/378,721.45
  6. Step 6: Final answer
    x = 288,358.53

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1.5x scale

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.