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Finding the Fourth Proportional to 490,680.60, 736,020.90 and 420,696.60

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Solution

The fourth proportional to 490,680.60, 736,020.90 and 420,696.60 is: 631,044.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,680.60 : 736,020.90 = 420,696.60 : x
  2. Step 2: Convert to fraction form
    490,680.60/736,020.90 = 420,696.60/x
  3. Step 3: Cross multiply
    490,680.60x = 736,020.90 × 420,696.60
  4. Step 4: Simplify right side
    490,680.60x = 309,641,490,158.94
  5. Step 5: Solve for x
    x = 309,641,490,158.94/490,680.60
  6. Step 6: Final answer
    x = 631,044.90

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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.