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Finding the Fourth Proportional to 291,439.60, 437,029.80 and 133,716.40

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Solution

The fourth proportional to 291,439.60, 437,029.80 and 133,716.40 is: 200,515.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,439.60 : 437,029.80 = 133,716.40 : x
  2. Step 2: Convert to fraction form
    291,439.60/437,029.80 = 133,716.40/x
  3. Step 3: Cross multiply
    291,439.60x = 437,029.80 × 133,716.40
  4. Step 4: Simplify right side
    291,439.60x = 58,438,051,548.72
  5. Step 5: Solve for x
    x = 58,438,051,548.72/291,439.60
  6. Step 6: Final answer
    x = 200,515.14

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1.5x scale

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.