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Finding the Fourth Proportional to 443,591.10, 610,218.70 and 388,896.95

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Solution

The fourth proportional to 443,591.10, 610,218.70 and 388,896.95 is: 534,979.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,591.10 : 610,218.70 = 388,896.95 : x
  2. Step 2: Convert to fraction form
    443,591.10/610,218.70 = 388,896.95/x
  3. Step 3: Cross multiply
    443,591.10x = 610,218.70 × 388,896.95
  4. Step 4: Simplify right side
    443,591.10x = 237,312,191,816.27
  5. Step 5: Solve for x
    x = 237,312,191,816.27/443,591.10
  6. Step 6: Final answer
    x = 534,979.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.