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Finding the Fourth Proportional to 654,455.52, 981,369 and 388,250.64

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Solution

The fourth proportional to 654,455.52, 981,369 and 388,250.64 is: 582,189.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,455.52 : 981,369 = 388,250.64 : x
  2. Step 2: Convert to fraction form
    654,455.52/981,369 = 388,250.64/x
  3. Step 3: Cross multiply
    654,455.52x = 981,369 × 388,250.64
  4. Step 4: Simplify right side
    654,455.52x = 381,017,142,326.16
  5. Step 5: Solve for x
    x = 381,017,142,326.16/654,455.52
  6. Step 6: Final answer
    x = 582,189.52

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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.