Home / 285,296.28-393,721.14-157,971.78

Finding the Fourth Proportional to 285,296.28, 393,721.14 and 157,971.78

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Solution

The fourth proportional to 285,296.28, 393,721.14 and 157,971.78 is: 218,007.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,296.28 : 393,721.14 = 157,971.78 : x
  2. Step 2: Convert to fraction form
    285,296.28/393,721.14 = 157,971.78/x
  3. Step 3: Cross multiply
    285,296.28x = 393,721.14 × 157,971.78
  4. Step 4: Simplify right side
    285,296.28x = 62,196,829,309.43
  5. Step 5: Solve for x
    x = 62,196,829,309.43/285,296.28
  6. Step 6: Final answer
    x = 218,007.85

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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.