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Finding the Fourth Proportional to 291,211.56, 436,816.86 and 91,549.38

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Solution

The fourth proportional to 291,211.56, 436,816.86 and 91,549.38 is: 137,323.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,211.56 : 436,816.86 = 91,549.38 : x
  2. Step 2: Convert to fraction form
    291,211.56/436,816.86 = 91,549.38/x
  3. Step 3: Cross multiply
    291,211.56x = 436,816.86 × 91,549.38
  4. Step 4: Simplify right side
    291,211.56x = 39,990,312,706.55
  5. Step 5: Solve for x
    x = 39,990,312,706.55/291,211.56
  6. Step 6: Final answer
    x = 137,323.92

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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.