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Finding the Fourth Proportional to 291,338.78, 437,009.18 and 80,976.51

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Solution

The fourth proportional to 291,338.78, 437,009.18 and 80,976.51 is: 121,465.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,338.78 : 437,009.18 = 80,976.51 : x
  2. Step 2: Convert to fraction form
    291,338.78/437,009.18 = 80,976.51/x
  3. Step 3: Cross multiply
    291,338.78x = 437,009.18 × 80,976.51
  4. Step 4: Simplify right side
    291,338.78x = 35,387,477,829.48
  5. Step 5: Solve for x
    x = 35,387,477,829.48/291,338.78
  6. Step 6: Final answer
    x = 121,465.05

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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.