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Finding the Fourth Proportional to 291,338.80, 437,008.20 and 173,143.60

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Solution

The fourth proportional to 291,338.80, 437,008.20 and 173,143.60 is: 259,715.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,338.80 : 437,008.20 = 173,143.60 : x
  2. Step 2: Convert to fraction form
    291,338.80/437,008.20 = 173,143.60/x
  3. Step 3: Cross multiply
    291,338.80x = 437,008.20 × 173,143.60
  4. Step 4: Simplify right side
    291,338.80x = 75,665,172,977.52
  5. Step 5: Solve for x
    x = 75,665,172,977.52/291,338.80
  6. Step 6: Final answer
    x = 259,715.40

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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.