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Finding the Fourth Proportional to 490,706.60, 736,059.90 and 420,722.60

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Solution

The fourth proportional to 490,706.60, 736,059.90 and 420,722.60 is: 631,083.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,706.60 : 736,059.90 = 420,722.60 : x
  2. Step 2: Convert to fraction form
    490,706.60/736,059.90 = 420,722.60/x
  3. Step 3: Cross multiply
    490,706.60x = 736,059.90 × 420,722.60
  4. Step 4: Simplify right side
    490,706.60x = 309,677,034,883.74
  5. Step 5: Solve for x
    x = 309,677,034,883.74/490,706.60
  6. Step 6: Final answer
    x = 631,083.90

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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.