Home / 758,131.78-1,045,783.28-489,859.78

Finding the Fourth Proportional to 758,131.78, 1,045,783.28 and 489,859.78

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Solution

The fourth proportional to 758,131.78, 1,045,783.28 and 489,859.78 is: 675,723.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    758,131.78 : 1,045,783.28 = 489,859.78 : x
  2. Step 2: Convert to fraction form
    758,131.78/1,045,783.28 = 489,859.78/x
  3. Step 3: Cross multiply
    758,131.78x = 1,045,783.28 × 489,859.78
  4. Step 4: Simplify right side
    758,131.78x = 512,287,167,468.48
  5. Step 5: Solve for x
    x = 512,287,167,468.48/758,131.78
  6. Step 6: Final answer
    x = 675,723.11

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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.