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Finding the Fourth Proportional to 555,911.33, 767,239.90 and 351,981.20

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Solution

The fourth proportional to 555,911.33, 767,239.90 and 351,981.20 is: 485,786.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,911.33 : 767,239.90 = 351,981.20 : x
  2. Step 2: Convert to fraction form
    555,911.33/767,239.90 = 351,981.20/x
  3. Step 3: Cross multiply
    555,911.33x = 767,239.90 × 351,981.20
  4. Step 4: Simplify right side
    555,911.33x = 270,054,021,728.03
  5. Step 5: Solve for x
    x = 270,054,021,728.03/555,911.33
  6. Step 6: Final answer
    x = 485,786.15

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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.