Home / 990,781.20-1,486,632.60-518,000.40

Finding the Fourth Proportional to 990,781.20, 1,486,632.60 and 518,000.40

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Solution

The fourth proportional to 990,781.20, 1,486,632.60 and 518,000.40 is: 777,241.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,781.20 : 1,486,632.60 = 518,000.40 : x
  2. Step 2: Convert to fraction form
    990,781.20/1,486,632.60 = 518,000.40/x
  3. Step 3: Cross multiply
    990,781.20x = 1,486,632.60 × 518,000.40
  4. Step 4: Simplify right side
    990,781.20x = 770,076,281,453.04
  5. Step 5: Solve for x
    x = 770,076,281,453.04/990,781.20
  6. Step 6: Final answer
    x = 777,241.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.