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Finding the Fourth Proportional to 390,121.48, 538,215.59 and 244,842.48

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Solution

The fourth proportional to 390,121.48, 538,215.59 and 244,842.48 is: 337,787.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,121.48 : 538,215.59 = 244,842.48 : x
  2. Step 2: Convert to fraction form
    390,121.48/538,215.59 = 244,842.48/x
  3. Step 3: Cross multiply
    390,121.48x = 538,215.59 × 244,842.48
  4. Step 4: Simplify right side
    390,121.48x = 131,778,039,830.26
  5. Step 5: Solve for x
    x = 131,778,039,830.26/390,121.48
  6. Step 6: Final answer
    x = 337,787.19

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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.