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Finding the Fourth Proportional to 387,644.58, 534,922.11 and 217,904.22

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Solution

The fourth proportional to 387,644.58, 534,922.11 and 217,904.22 is: 300,692.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,644.58 : 534,922.11 = 217,904.22 : x
  2. Step 2: Convert to fraction form
    387,644.58/534,922.11 = 217,904.22/x
  3. Step 3: Cross multiply
    387,644.58x = 534,922.11 × 217,904.22
  4. Step 4: Simplify right side
    387,644.58x = 116,561,785,140.30
  5. Step 5: Solve for x
    x = 116,561,785,140.30/387,644.58
  6. Step 6: Final answer
    x = 300,692.42

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1.5x scale

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.