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Finding the Fourth Proportional to 538,352.52, 742,427.30 and 392,928.11

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Solution

The fourth proportional to 538,352.52, 742,427.30 and 392,928.11 is: 541,876.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,352.52 : 742,427.30 = 392,928.11 : x
  2. Step 2: Convert to fraction form
    538,352.52/742,427.30 = 392,928.11/x
  3. Step 3: Cross multiply
    538,352.52x = 742,427.30 × 392,928.11
  4. Step 4: Simplify right side
    538,352.52x = 291,720,555,855.69
  5. Step 5: Solve for x
    x = 291,720,555,855.69/538,352.52
  6. Step 6: Final answer
    x = 541,876.46

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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.