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Finding the Fourth Proportional to 398,001.40, 595,689.90 and 279,903.40

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Solution

The fourth proportional to 398,001.40, 595,689.90 and 279,903.40 is: 418,932.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,001.40 : 595,689.90 = 279,903.40 : x
  2. Step 2: Convert to fraction form
    398,001.40/595,689.90 = 279,903.40/x
  3. Step 3: Cross multiply
    398,001.40x = 595,689.90 × 279,903.40
  4. Step 4: Simplify right side
    398,001.40x = 166,735,628,355.66
  5. Step 5: Solve for x
    x = 166,735,628,355.66/398,001.40
  6. Step 6: Final answer
    x = 418,932.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.