Home / 990,914.50-1,486,445.87-280,999.72

Finding the Fourth Proportional to 990,914.50, 1,486,445.87 and 280,999.72

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Solution

The fourth proportional to 990,914.50, 1,486,445.87 and 280,999.72 is: 421,520.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,914.50 : 1,486,445.87 = 280,999.72 : x
  2. Step 2: Convert to fraction form
    990,914.50/1,486,445.87 = 280,999.72/x
  3. Step 3: Cross multiply
    990,914.50x = 1,486,445.87 × 280,999.72
  4. Step 4: Simplify right side
    990,914.50x = 417,690,873,265.16
  5. Step 5: Solve for x
    x = 417,690,873,265.16/990,914.50
  6. Step 6: Final answer
    x = 421,520.60

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1.5x scale

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.