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Finding the Fourth Proportional to 354,135.57, 488,707.18 and 192,990.66

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Solution

The fourth proportional to 354,135.57, 488,707.18 and 192,990.66 is: 266,327.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,135.57 : 488,707.18 = 192,990.66 : x
  2. Step 2: Convert to fraction form
    354,135.57/488,707.18 = 192,990.66/x
  3. Step 3: Cross multiply
    354,135.57x = 488,707.18 × 192,990.66
  4. Step 4: Simplify right side
    354,135.57x = 94,315,921,214.94
  5. Step 5: Solve for x
    x = 94,315,921,214.94/354,135.57
  6. Step 6: Final answer
    x = 266,327.16

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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.