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Finding the Fourth Proportional to 404,928.64, 606,726.51 and 138,543.58

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Solution

The fourth proportional to 404,928.64, 606,726.51 and 138,543.58 is: 207,587.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,928.64 : 606,726.51 = 138,543.58 : x
  2. Step 2: Convert to fraction form
    404,928.64/606,726.51 = 138,543.58/x
  3. Step 3: Cross multiply
    404,928.64x = 606,726.51 × 138,543.58
  4. Step 4: Simplify right side
    404,928.64x = 84,058,062,776.31
  5. Step 5: Solve for x
    x = 84,058,062,776.31/404,928.64
  6. Step 6: Final answer
    x = 207,587.35

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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.