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Finding the Fourth Proportional to 646,718.92, 892,473.73 and 388,600.18

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Solution

The fourth proportional to 646,718.92, 892,473.73 and 388,600.18 is: 536,269.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,718.92 : 892,473.73 = 388,600.18 : x
  2. Step 2: Convert to fraction form
    646,718.92/892,473.73 = 388,600.18/x
  3. Step 3: Cross multiply
    646,718.92x = 892,473.73 × 388,600.18
  4. Step 4: Simplify right side
    646,718.92x = 346,815,446,797.28
  5. Step 5: Solve for x
    x = 346,815,446,797.28/646,718.92
  6. Step 6: Final answer
    x = 536,269.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.