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Finding the Fourth Proportional to 555,640.49, 766,782.21 and 313,922.97

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Solution

The fourth proportional to 555,640.49, 766,782.21 and 313,922.97 is: 433,212.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,640.49 : 766,782.21 = 313,922.97 : x
  2. Step 2: Convert to fraction form
    555,640.49/766,782.21 = 313,922.97/x
  3. Step 3: Cross multiply
    555,640.49x = 766,782.21 × 313,922.97
  4. Step 4: Simplify right side
    555,640.49x = 240,710,548,706.36
  5. Step 5: Solve for x
    x = 240,710,548,706.36/555,640.49
  6. Step 6: Final answer
    x = 433,212.76

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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.