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Finding the Fourth Proportional to 390,346.80, 538,463.37 and 269,551.50

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Solution

The fourth proportional to 390,346.80, 538,463.37 and 269,551.50 is: 371,832.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,346.80 : 538,463.37 = 269,551.50 : x
  2. Step 2: Convert to fraction form
    390,346.80/538,463.37 = 269,551.50/x
  3. Step 3: Cross multiply
    390,346.80x = 538,463.37 × 269,551.50
  4. Step 4: Simplify right side
    390,346.80x = 145,143,609,078.56
  5. Step 5: Solve for x
    x = 145,143,609,078.56/390,346.80
  6. Step 6: Final answer
    x = 371,832.46

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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.