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Finding the Fourth Proportional to 291,453.84, 437,196.36 and 91,789.78

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Solution

The fourth proportional to 291,453.84, 437,196.36 and 91,789.78 is: 137,689.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,453.84 : 437,196.36 = 91,789.78 : x
  2. Step 2: Convert to fraction form
    291,453.84/437,196.36 = 91,789.78/x
  3. Step 3: Cross multiply
    291,453.84x = 437,196.36 × 91,789.78
  4. Step 4: Simplify right side
    291,453.84x = 40,130,155,515.22
  5. Step 5: Solve for x
    x = 40,130,155,515.22/291,453.84
  6. Step 6: Final answer
    x = 137,689.58

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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.