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Finding the Fourth Proportional to 291,902.20, 437,820.90 and 239,219.80

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Solution

The fourth proportional to 291,902.20, 437,820.90 and 239,219.80 is: 358,803.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,902.20 : 437,820.90 = 239,219.80 : x
  2. Step 2: Convert to fraction form
    291,902.20/437,820.90 = 239,219.80/x
  3. Step 3: Cross multiply
    291,902.20x = 437,820.90 × 239,219.80
  4. Step 4: Simplify right side
    291,902.20x = 104,735,428,133.82
  5. Step 5: Solve for x
    x = 104,735,428,133.82/291,902.20
  6. Step 6: Final answer
    x = 358,803.15

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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.