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Finding the Fourth Proportional to 291,728.40, 436,901.40 and 197,725.20

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Solution

The fourth proportional to 291,728.40, 436,901.40 and 197,725.20 is: 296,119.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,728.40 : 436,901.40 = 197,725.20 : x
  2. Step 2: Convert to fraction form
    291,728.40/436,901.40 = 197,725.20/x
  3. Step 3: Cross multiply
    291,728.40x = 436,901.40 × 197,725.20
  4. Step 4: Simplify right side
    291,728.40x = 86,386,416,695.28
  5. Step 5: Solve for x
    x = 86,386,416,695.28/291,728.40
  6. Step 6: Final answer
    x = 296,119.32

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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.