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Finding the Fourth Proportional to 387,625.86, 581,438.80 and 121,407.22

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Solution

The fourth proportional to 387,625.86, 581,438.80 and 121,407.22 is: 182,110.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,625.86 : 581,438.80 = 121,407.22 : x
  2. Step 2: Convert to fraction form
    387,625.86/581,438.80 = 121,407.22/x
  3. Step 3: Cross multiply
    387,625.86x = 581,438.80 × 121,407.22
  4. Step 4: Simplify right side
    387,625.86x = 70,590,868,308.14
  5. Step 5: Solve for x
    x = 70,590,868,308.14/387,625.86
  6. Step 6: Final answer
    x = 182,110.83

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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.