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Finding the Fourth Proportional to 291,665.28, 437,507.28 and 91,987.52

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Solution

The fourth proportional to 291,665.28, 437,507.28 and 91,987.52 is: 137,984.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,665.28 : 437,507.28 = 91,987.52 : x
  2. Step 2: Convert to fraction form
    291,665.28/437,507.28 = 91,987.52/x
  3. Step 3: Cross multiply
    291,665.28x = 437,507.28 × 91,987.52
  4. Step 4: Simplify right side
    291,665.28x = 40,245,209,669.15
  5. Step 5: Solve for x
    x = 40,245,209,669.15/291,665.28
  6. Step 6: Final answer
    x = 137,984.23

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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.