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Finding the Fourth Proportional to 387,005.58, 580,464.36 and 134,239.32

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Solution

The fourth proportional to 387,005.58, 580,464.36 and 134,239.32 is: 201,343.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,005.58 : 580,464.36 = 134,239.32 : x
  2. Step 2: Convert to fraction form
    387,005.58/580,464.36 = 134,239.32/x
  3. Step 3: Cross multiply
    387,005.58x = 580,464.36 × 134,239.32
  4. Step 4: Simplify right side
    387,005.58x = 77,921,140,970.64
  5. Step 5: Solve for x
    x = 77,921,140,970.64/387,005.58
  6. Step 6: Final answer
    x = 201,343.71

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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.