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Finding the Fourth Proportional to 388,091.97, 535,500.29 and 356,699.79

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Solution

The fourth proportional to 388,091.97, 535,500.29 and 356,699.79 is: 492,184.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,091.97 : 535,500.29 = 356,699.79 : x
  2. Step 2: Convert to fraction form
    388,091.97/535,500.29 = 356,699.79/x
  3. Step 3: Cross multiply
    388,091.97x = 535,500.29 × 356,699.79
  4. Step 4: Simplify right side
    388,091.97x = 191,012,841,879.69
  5. Step 5: Solve for x
    x = 191,012,841,879.69/388,091.97
  6. Step 6: Final answer
    x = 492,184.47

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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.