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Finding the Fourth Proportional to 965,999.70, 1,448,999.55 and 611,414.10

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Solution

The fourth proportional to 965,999.70, 1,448,999.55 and 611,414.10 is: 917,121.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    965,999.70 : 1,448,999.55 = 611,414.10 : x
  2. Step 2: Convert to fraction form
    965,999.70/1,448,999.55 = 611,414.10/x
  3. Step 3: Cross multiply
    965,999.70x = 1,448,999.55 × 611,414.10
  4. Step 4: Simplify right side
    965,999.70x = 885,938,755,763.66
  5. Step 5: Solve for x
    x = 885,938,755,763.66/965,999.70
  6. Step 6: Final answer
    x = 917,121.15

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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.