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Finding the Fourth Proportional to 291,316.32, 436,993.47 and 91,644.48

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Solution

The fourth proportional to 291,316.32, 436,993.47 and 91,644.48 is: 137,472.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,316.32 : 436,993.47 = 91,644.48 : x
  2. Step 2: Convert to fraction form
    291,316.32/436,993.47 = 91,644.48/x
  3. Step 3: Cross multiply
    291,316.32x = 436,993.47 × 91,644.48
  4. Step 4: Simplify right side
    291,316.32x = 40,048,039,321.55
  5. Step 5: Solve for x
    x = 40,048,039,321.55/291,316.32
  6. Step 6: Final answer
    x = 137,472.69

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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.