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Finding the Fourth Proportional to 422,711.77, 583,430.31 and 388,666.39

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Solution

The fourth proportional to 422,711.77, 583,430.31 and 388,666.39 is: 536,440.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,711.77 : 583,430.31 = 388,666.39 : x
  2. Step 2: Convert to fraction form
    422,711.77/583,430.31 = 388,666.39/x
  3. Step 3: Cross multiply
    422,711.77x = 583,430.31 × 388,666.39
  4. Step 4: Simplify right side
    422,711.77x = 226,759,752,404.28
  5. Step 5: Solve for x
    x = 226,759,752,404.28/422,711.77
  6. Step 6: Final answer
    x = 536,440.59

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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.