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Finding the Fourth Proportional to 393,642.69, 590,557.73 and 127,403.21

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Solution

The fourth proportional to 393,642.69, 590,557.73 and 127,403.21 is: 191,135.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,642.69 : 590,557.73 = 127,403.21 : x
  2. Step 2: Convert to fraction form
    393,642.69/590,557.73 = 127,403.21/x
  3. Step 3: Cross multiply
    393,642.69x = 590,557.73 × 127,403.21
  4. Step 4: Simplify right side
    393,642.69x = 75,238,946,902.51
  5. Step 5: Solve for x
    x = 75,238,946,902.51/393,642.69
  6. Step 6: Final answer
    x = 191,135.13

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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.