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Finding the Fourth Proportional to 291,378.48, 437,125.80 and 91,749.12

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Solution

The fourth proportional to 291,378.48, 437,125.80 and 91,749.12 is: 137,641.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,378.48 : 437,125.80 = 91,749.12 : x
  2. Step 2: Convert to fraction form
    291,378.48/437,125.80 = 91,749.12/x
  3. Step 3: Cross multiply
    291,378.48x = 437,125.80 × 91,749.12
  4. Step 4: Simplify right side
    291,378.48x = 40,105,907,479.30
  5. Step 5: Solve for x
    x = 40,105,907,479.30/291,378.48
  6. Step 6: Final answer
    x = 137,641.97

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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.