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Finding the Fourth Proportional to 449,593.66, 620,432 and 245,640.20

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Solution

The fourth proportional to 449,593.66, 620,432 and 245,640.20 is: 338,979.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,593.66 : 620,432 = 245,640.20 : x
  2. Step 2: Convert to fraction form
    449,593.66/620,432 = 245,640.20/x
  3. Step 3: Cross multiply
    449,593.66x = 620,432 × 245,640.20
  4. Step 4: Simplify right side
    449,593.66x = 152,403,040,566.40
  5. Step 5: Solve for x
    x = 152,403,040,566.40/449,593.66
  6. Step 6: Final answer
    x = 338,979.51

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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.