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Finding the Fourth Proportional to 387,718.92, 535,100.31 and 217,953.18

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Solution

The fourth proportional to 387,718.92, 535,100.31 and 217,953.18 is: 300,802.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,718.92 : 535,100.31 = 217,953.18 : x
  2. Step 2: Convert to fraction form
    387,718.92/535,100.31 = 217,953.18/x
  3. Step 3: Cross multiply
    387,718.92x = 535,100.31 × 217,953.18
  4. Step 4: Simplify right side
    387,718.92x = 116,626,814,183.49
  5. Step 5: Solve for x
    x = 116,626,814,183.49/387,718.92
  6. Step 6: Final answer
    x = 300,802.48

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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.