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Finding the Fourth Proportional to 291,606.75, 437,410.13 and 69,990.75

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Solution

The fourth proportional to 291,606.75, 437,410.13 and 69,990.75 is: 104,986.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,606.75 : 437,410.13 = 69,990.75 : x
  2. Step 2: Convert to fraction form
    291,606.75/437,410.13 = 69,990.75/x
  3. Step 3: Cross multiply
    291,606.75x = 437,410.13 × 69,990.75
  4. Step 4: Simplify right side
    291,606.75x = 30,614,662,706.34
  5. Step 5: Solve for x
    x = 30,614,662,706.34/291,606.75
  6. Step 6: Final answer
    x = 104,986.13

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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.