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Finding the Fourth Proportional to 805,651.92, 1,207,648.44 and 431,574.48

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Solution

The fourth proportional to 805,651.92, 1,207,648.44 and 431,574.48 is: 646,917.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,651.92 : 1,207,648.44 = 431,574.48 : x
  2. Step 2: Convert to fraction form
    805,651.92/1,207,648.44 = 431,574.48/x
  3. Step 3: Cross multiply
    805,651.92x = 1,207,648.44 × 431,574.48
  4. Step 4: Simplify right side
    805,651.92x = 521,190,247,515.81
  5. Step 5: Solve for x
    x = 521,190,247,515.81/805,651.92
  6. Step 6: Final answer
    x = 646,917.40

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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.