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Finding the Fourth Proportional to 1,434,603.05, 1,976,384.80 and 998,270.02

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Solution

The fourth proportional to 1,434,603.05, 1,976,384.80 and 998,270.02 is: 1,375,269.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434,603.05 : 1,976,384.80 = 998,270.02 : x
  2. Step 2: Convert to fraction form
    1,434,603.05/1,976,384.80 = 998,270.02/x
  3. Step 3: Cross multiply
    1,434,603.05x = 1,976,384.80 × 998,270.02
  4. Step 4: Simplify right side
    1,434,603.05x = 1,972,965,691,378.41
  5. Step 5: Solve for x
    x = 1,972,965,691,378.41/1,434,603.05
  6. Step 6: Final answer
    x = 1,375,269.42

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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.