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Finding the Fourth Proportional to 285,282.90, 393,690.41 and 157,958.49

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Solution

The fourth proportional to 285,282.90, 393,690.41 and 157,958.49 is: 217,982.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,282.90 : 393,690.41 = 157,958.49 : x
  2. Step 2: Convert to fraction form
    285,282.90/393,690.41 = 157,958.49/x
  3. Step 3: Cross multiply
    285,282.90x = 393,690.41 × 157,958.49
  4. Step 4: Simplify right side
    285,282.90x = 62,186,741,901.29
  5. Step 5: Solve for x
    x = 62,186,741,901.29/285,282.90
  6. Step 6: Final answer
    x = 217,982.72

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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.