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Finding the Fourth Proportional to 680,801.20, 1,019,969.88 and 490,229.80

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Solution

The fourth proportional to 680,801.20, 1,019,969.88 and 490,229.80 is: 734,457.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,801.20 : 1,019,969.88 = 490,229.80 : x
  2. Step 2: Convert to fraction form
    680,801.20/1,019,969.88 = 490,229.80/x
  3. Step 3: Cross multiply
    680,801.20x = 1,019,969.88 × 490,229.80
  4. Step 4: Simplify right side
    680,801.20x = 500,019,630,278.42
  5. Step 5: Solve for x
    x = 500,019,630,278.42/680,801.20
  6. Step 6: Final answer
    x = 734,457.62

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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.