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Finding the Fourth Proportional to 815,660.40, 1,221,071.40 and 606,226.80

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Solution

The fourth proportional to 815,660.40, 1,221,071.40 and 606,226.80 is: 907,542.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,660.40 : 1,221,071.40 = 606,226.80 : x
  2. Step 2: Convert to fraction form
    815,660.40/1,221,071.40 = 606,226.80/x
  3. Step 3: Cross multiply
    815,660.40x = 1,221,071.40 × 606,226.80
  4. Step 4: Simplify right side
    815,660.40x = 740,246,207,393.52
  5. Step 5: Solve for x
    x = 740,246,207,393.52/815,660.40
  6. Step 6: Final answer
    x = 907,542.17

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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.