Home / 990,780.20-1,486,631.10-517,999.40

Finding the Fourth Proportional to 990,780.20, 1,486,631.10 and 517,999.40

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Solution

The fourth proportional to 990,780.20, 1,486,631.10 and 517,999.40 is: 777,240.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,780.20 : 1,486,631.10 = 517,999.40 : x
  2. Step 2: Convert to fraction form
    990,780.20/1,486,631.10 = 517,999.40/x
  3. Step 3: Cross multiply
    990,780.20x = 1,486,631.10 × 517,999.40
  4. Step 4: Simplify right side
    990,780.20x = 770,074,017,821.34
  5. Step 5: Solve for x
    x = 770,074,017,821.34/990,780.20
  6. Step 6: Final answer
    x = 777,240.02

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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.