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Finding the Fourth Proportional to 291,642.40, 437,223.60 and 131,728.80

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Solution

The fourth proportional to 291,642.40, 437,223.60 and 131,728.80 is: 197,484.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,642.40 : 437,223.60 = 131,728.80 : x
  2. Step 2: Convert to fraction form
    291,642.40/437,223.60 = 131,728.80/x
  3. Step 3: Cross multiply
    291,642.40x = 437,223.60 × 131,728.80
  4. Step 4: Simplify right side
    291,642.40x = 57,594,940,159.68
  5. Step 5: Solve for x
    x = 57,594,940,159.68/291,642.40
  6. Step 6: Final answer
    x = 197,484.80

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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.