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Finding the Fourth Proportional to 387,208.48, 580,740.72 and 120,975.52

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Solution

The fourth proportional to 387,208.48, 580,740.72 and 120,975.52 is: 181,440.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,208.48 : 580,740.72 = 120,975.52 : x
  2. Step 2: Convert to fraction form
    387,208.48/580,740.72 = 120,975.52/x
  3. Step 3: Cross multiply
    387,208.48x = 580,740.72 × 120,975.52
  4. Step 4: Simplify right side
    387,208.48x = 70,255,410,587.17
  5. Step 5: Solve for x
    x = 70,255,410,587.17/387,208.48
  6. Step 6: Final answer
    x = 181,440.79

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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.