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Finding the Fourth Proportional to 426,242, 639,374.52 and 130,754

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Solution

The fourth proportional to 426,242, 639,374.52 and 130,754 is: 196,134.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,242 : 639,374.52 = 130,754 : x
  2. Step 2: Convert to fraction form
    426,242/639,374.52 = 130,754/x
  3. Step 3: Cross multiply
    426,242x = 639,374.52 × 130,754
  4. Step 4: Simplify right side
    426,242x = 83,600,775,988.08
  5. Step 5: Solve for x
    x = 83,600,775,988.08/426,242
  6. Step 6: Final answer
    x = 196,134.53

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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.