Home / 378,915.40-522,907.59-209,149.66

Finding the Fourth Proportional to 378,915.40, 522,907.59 and 209,149.66

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Solution

The fourth proportional to 378,915.40, 522,907.59 and 209,149.66 is: 288,628.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,915.40 : 522,907.59 = 209,149.66 : x
  2. Step 2: Convert to fraction form
    378,915.40/522,907.59 = 209,149.66/x
  3. Step 3: Cross multiply
    378,915.40x = 522,907.59 × 209,149.66
  4. Step 4: Simplify right side
    378,915.40x = 109,365,944,659.92
  5. Step 5: Solve for x
    x = 109,365,944,659.92/378,915.40
  6. Step 6: Final answer
    x = 288,628.93

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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.