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Finding the Fourth Proportional to 611,320, 915,687.22 and 386,564.44

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Solution

The fourth proportional to 611,320, 915,687.22 and 386,564.44 is: 579,029.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,320 : 915,687.22 = 386,564.44 : x
  2. Step 2: Convert to fraction form
    611,320/915,687.22 = 386,564.44/x
  3. Step 3: Cross multiply
    611,320x = 915,687.22 × 386,564.44
  4. Step 4: Simplify right side
    611,320x = 353,972,117,414.46
  5. Step 5: Solve for x
    x = 353,972,117,414.46/611,320
  6. Step 6: Final answer
    x = 579,029.18

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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.