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Finding the Fourth Proportional to 291,617.70, 437,426.55 and 197,139.30

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Solution

The fourth proportional to 291,617.70, 437,426.55 and 197,139.30 is: 295,708.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,617.70 : 437,426.55 = 197,139.30 : x
  2. Step 2: Convert to fraction form
    291,617.70/437,426.55 = 197,139.30/x
  3. Step 3: Cross multiply
    291,617.70x = 437,426.55 × 197,139.30
  4. Step 4: Simplify right side
    291,617.70x = 86,233,963,868.42
  5. Step 5: Solve for x
    x = 86,233,963,868.42/291,617.70
  6. Step 6: Final answer
    x = 295,708.95

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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.