Home / 876,276.45-1,209,270.60-489,128.40

Finding the Fourth Proportional to 876,276.45, 1,209,270.60 and 489,128.40

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Solution

The fourth proportional to 876,276.45, 1,209,270.60 and 489,128.40 is: 675,002.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,276.45 : 1,209,270.60 = 489,128.40 : x
  2. Step 2: Convert to fraction form
    876,276.45/1,209,270.60 = 489,128.40/x
  3. Step 3: Cross multiply
    876,276.45x = 1,209,270.60 × 489,128.40
  4. Step 4: Simplify right side
    876,276.45x = 591,488,593,745.04
  5. Step 5: Solve for x
    x = 591,488,593,745.04/876,276.45
  6. Step 6: Final answer
    x = 675,002.27

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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.