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Finding the Fourth Proportional to 387,433.64, 534,672.18 and 217,664.36

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Solution

The fourth proportional to 387,433.64, 534,672.18 and 217,664.36 is: 300,384.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,433.64 : 534,672.18 = 217,664.36 : x
  2. Step 2: Convert to fraction form
    387,433.64/534,672.18 = 217,664.36/x
  3. Step 3: Cross multiply
    387,433.64x = 534,672.18 × 217,664.36
  4. Step 4: Simplify right side
    387,433.64x = 116,379,077,869.51
  5. Step 5: Solve for x
    x = 116,379,077,869.51/387,433.64
  6. Step 6: Final answer
    x = 300,384.55

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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.