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Finding the Fourth Proportional to 661,221.84, 912,422.48 and 370,845.36

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Solution

The fourth proportional to 661,221.84, 912,422.48 and 370,845.36 is: 511,730.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,221.84 : 912,422.48 = 370,845.36 : x
  2. Step 2: Convert to fraction form
    661,221.84/912,422.48 = 370,845.36/x
  3. Step 3: Cross multiply
    661,221.84x = 912,422.48 × 370,845.36
  4. Step 4: Simplify right side
    661,221.84x = 338,367,643,067.69
  5. Step 5: Solve for x
    x = 338,367,643,067.69/661,221.84
  6. Step 6: Final answer
    x = 511,730.89

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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.