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Finding the Fourth Proportional to 387,622.30, 581,433.45 and 121,403.65

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Solution

The fourth proportional to 387,622.30, 581,433.45 and 121,403.65 is: 182,105.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,622.30 : 581,433.45 = 121,403.65 : x
  2. Step 2: Convert to fraction form
    387,622.30/581,433.45 = 121,403.65/x
  3. Step 3: Cross multiply
    387,622.30x = 581,433.45 × 121,403.65
  4. Step 4: Simplify right side
    387,622.30x = 70,588,143,062.09
  5. Step 5: Solve for x
    x = 70,588,143,062.09/387,622.30
  6. Step 6: Final answer
    x = 182,105.48

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.