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Finding the Fourth Proportional to 285,143.01, 393,470.49 and 170,398.80

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Solution

The fourth proportional to 285,143.01, 393,470.49 and 170,398.80 is: 235,134.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,143.01 : 393,470.49 = 170,398.80 : x
  2. Step 2: Convert to fraction form
    285,143.01/393,470.49 = 170,398.80/x
  3. Step 3: Cross multiply
    285,143.01x = 393,470.49 × 170,398.80
  4. Step 4: Simplify right side
    285,143.01x = 67,046,899,331.41
  5. Step 5: Solve for x
    x = 67,046,899,331.41/285,143.01
  6. Step 6: Final answer
    x = 235,134.29

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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.