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Finding the Fourth Proportional to 648,694.60, 970,709.10 and 438,742.60

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Solution

The fourth proportional to 648,694.60, 970,709.10 and 438,742.60 is: 656,536.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,694.60 : 970,709.10 = 438,742.60 : x
  2. Step 2: Convert to fraction form
    648,694.60/970,709.10 = 438,742.60/x
  3. Step 3: Cross multiply
    648,694.60x = 970,709.10 × 438,742.60
  4. Step 4: Simplify right side
    648,694.60x = 425,891,434,377.66
  5. Step 5: Solve for x
    x = 425,891,434,377.66/648,694.60
  6. Step 6: Final answer
    x = 656,536.12

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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.