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Finding the Fourth Proportional to 378,720.70, 567,315.60 and 236,128.30

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Solution

The fourth proportional to 378,720.70, 567,315.60 and 236,128.30 is: 353,715.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,720.70 : 567,315.60 = 236,128.30 : x
  2. Step 2: Convert to fraction form
    378,720.70/567,315.60 = 236,128.30/x
  3. Step 3: Cross multiply
    378,720.70x = 567,315.60 × 236,128.30
  4. Step 4: Simplify right side
    378,720.70x = 133,959,268,191.48
  5. Step 5: Solve for x
    x = 133,959,268,191.48/378,720.70
  6. Step 6: Final answer
    x = 353,715.20

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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.