Home / 758,129.78-1,045,780.52-489,857.78

Finding the Fourth Proportional to 758,129.78, 1,045,780.52 and 489,857.78

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Solution

The fourth proportional to 758,129.78, 1,045,780.52 and 489,857.78 is: 675,720.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    758,129.78 : 1,045,780.52 = 489,857.78 : x
  2. Step 2: Convert to fraction form
    758,129.78/1,045,780.52 = 489,857.78/x
  3. Step 3: Cross multiply
    758,129.78x = 1,045,780.52 × 489,857.78
  4. Step 4: Simplify right side
    758,129.78x = 512,283,723,894.45
  5. Step 5: Solve for x
    x = 512,283,723,894.45/758,129.78
  6. Step 6: Final answer
    x = 675,720.35

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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.