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Finding the Fourth Proportional to 555,052.10, 765,991.74 and 313,377.66

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Solution

The fourth proportional to 555,052.10, 765,991.74 and 313,377.66 is: 432,472.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,052.10 : 765,991.74 = 313,377.66 : x
  2. Step 2: Convert to fraction form
    555,052.10/765,991.74 = 313,377.66/x
  3. Step 3: Cross multiply
    555,052.10x = 765,991.74 × 313,377.66
  4. Step 4: Simplify right side
    555,052.10x = 240,044,698,472.95
  5. Step 5: Solve for x
    x = 240,044,698,472.95/555,052.10
  6. Step 6: Final answer
    x = 432,472.38

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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.