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Finding the Fourth Proportional to 382,711.94, 528,215.58 and 253,422.38

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Solution

The fourth proportional to 382,711.94, 528,215.58 and 253,422.38 is: 349,771.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,711.94 : 528,215.58 = 253,422.38 : x
  2. Step 2: Convert to fraction form
    382,711.94/528,215.58 = 253,422.38/x
  3. Step 3: Cross multiply
    382,711.94x = 528,215.58 × 253,422.38
  4. Step 4: Simplify right side
    382,711.94x = 133,861,649,436.68
  5. Step 5: Solve for x
    x = 133,861,649,436.68/382,711.94
  6. Step 6: Final answer
    x = 349,771.29

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Half scale
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Double scale
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Similar ratio
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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.