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Finding the Fourth Proportional to 752,718.78, 1,038,279.47 and 446,578.47

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Solution

The fourth proportional to 752,718.78, 1,038,279.47 and 446,578.47 is: 615,997.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    752,718.78 : 1,038,279.47 = 446,578.47 : x
  2. Step 2: Convert to fraction form
    752,718.78/1,038,279.47 = 446,578.47/x
  3. Step 3: Cross multiply
    752,718.78x = 1,038,279.47 × 446,578.47
  4. Step 4: Simplify right side
    752,718.78x = 463,673,254,912.12
  5. Step 5: Solve for x
    x = 463,673,254,912.12/752,718.78
  6. Step 6: Final answer
    x = 615,997.99

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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.