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Finding the Fourth Proportional to 387,035.52, 580,618.98 and 120,790.14

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Solution

The fourth proportional to 387,035.52, 580,618.98 and 120,790.14 is: 181,205.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,035.52 : 580,618.98 = 120,790.14 : x
  2. Step 2: Convert to fraction form
    387,035.52/580,618.98 = 120,790.14/x
  3. Step 3: Cross multiply
    387,035.52x = 580,618.98 × 120,790.14
  4. Step 4: Simplify right side
    387,035.52x = 70,133,047,880.86
  5. Step 5: Solve for x
    x = 70,133,047,880.86/387,035.52
  6. Step 6: Final answer
    x = 181,205.71

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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.