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Finding the Fourth Proportional to 320,480.71, 442,318.88 and 193,156.45

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Solution

The fourth proportional to 320,480.71, 442,318.88 and 193,156.45 is: 266,589.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,480.71 : 442,318.88 = 193,156.45 : x
  2. Step 2: Convert to fraction form
    320,480.71/442,318.88 = 193,156.45/x
  3. Step 3: Cross multiply
    320,480.71x = 442,318.88 × 193,156.45
  4. Step 4: Simplify right side
    320,480.71x = 85,436,744,628.78
  5. Step 5: Solve for x
    x = 85,436,744,628.78/320,480.71
  6. Step 6: Final answer
    x = 266,589.35

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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.