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Finding the Fourth Proportional to 653,401.40, 901,791.54 and 398,900.36

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Solution

The fourth proportional to 653,401.40, 901,791.54 and 398,900.36 is: 550,542.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,401.40 : 901,791.54 = 398,900.36 : x
  2. Step 2: Convert to fraction form
    653,401.40/901,791.54 = 398,900.36/x
  3. Step 3: Cross multiply
    653,401.40x = 901,791.54 × 398,900.36
  4. Step 4: Simplify right side
    653,401.40x = 359,724,969,950.95
  5. Step 5: Solve for x
    x = 359,724,969,950.95/653,401.40
  6. Step 6: Final answer
    x = 550,542.09

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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.