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Finding the Fourth Proportional to 643,064.97, 887,365.73 and 371,220.44

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Solution

The fourth proportional to 643,064.97, 887,365.73 and 371,220.44 is: 512,247.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,064.97 : 887,365.73 = 371,220.44 : x
  2. Step 2: Convert to fraction form
    643,064.97/887,365.73 = 371,220.44/x
  3. Step 3: Cross multiply
    643,064.97x = 887,365.73 × 371,220.44
  4. Step 4: Simplify right side
    643,064.97x = 329,408,293,222.74
  5. Step 5: Solve for x
    x = 329,408,293,222.74/643,064.97
  6. Step 6: Final answer
    x = 512,247.29

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1.5x scale

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.