Home / 679,945.28-938,356.29-393,410.00

Finding the Fourth Proportional to 679,945.28, 938,356.29 and 393,410.00

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Solution

The fourth proportional to 679,945.28, 938,356.29 and 393,410.00 is: 542,924.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,945.28 : 938,356.29 = 393,410.00 : x
  2. Step 2: Convert to fraction form
    679,945.28/938,356.29 = 393,410.00/x
  3. Step 3: Cross multiply
    679,945.28x = 938,356.29 × 393,410.00
  4. Step 4: Simplify right side
    679,945.28x = 369,158,743,357.12
  5. Step 5: Solve for x
    x = 369,158,743,357.12/679,945.28
  6. Step 6: Final answer
    x = 542,924.20

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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.