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Finding the Fourth Proportional to 291,043.72, 436,565.70 and 130,932.64

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Solution

The fourth proportional to 291,043.72, 436,565.70 and 130,932.64 is: 196,399.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,043.72 : 436,565.70 = 130,932.64 : x
  2. Step 2: Convert to fraction form
    291,043.72/436,565.70 = 130,932.64/x
  3. Step 3: Cross multiply
    291,043.72x = 436,565.70 × 130,932.64
  4. Step 4: Simplify right side
    291,043.72x = 57,160,700,180.16
  5. Step 5: Solve for x
    x = 57,160,700,180.16/291,043.72
  6. Step 6: Final answer
    x = 196,399.02

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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.