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Finding the Fourth Proportional to 291,703.20, 437,522.40 and 239,020.80

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Solution

The fourth proportional to 291,703.20, 437,522.40 and 239,020.80 is: 358,504.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,703.20 : 437,522.40 = 239,020.80 : x
  2. Step 2: Convert to fraction form
    291,703.20/437,522.40 = 239,020.80/x
  3. Step 3: Cross multiply
    291,703.20x = 437,522.40 × 239,020.80
  4. Step 4: Simplify right side
    291,703.20x = 104,576,954,065.92
  5. Step 5: Solve for x
    x = 104,576,954,065.92/291,703.20
  6. Step 6: Final answer
    x = 358,504.65

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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.