Home / 876,849.40-1,209,930.78-489,617.56

Finding the Fourth Proportional to 876,849.40, 1,209,930.78 and 489,617.56

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Solution

The fourth proportional to 876,849.40, 1,209,930.78 and 489,617.56 is: 675,604.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,849.40 : 1,209,930.78 = 489,617.56 : x
  2. Step 2: Convert to fraction form
    876,849.40/1,209,930.78 = 489,617.56/x
  3. Step 3: Cross multiply
    876,849.40x = 1,209,930.78 × 489,617.56
  4. Step 4: Simplify right side
    876,849.40x = 592,403,356,272.50
  5. Step 5: Solve for x
    x = 592,403,356,272.50/876,849.40
  6. Step 6: Final answer
    x = 675,604.45

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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.