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Finding the Fourth Proportional to 426,253.34, 639,374.44 and 122,655.42

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Solution

The fourth proportional to 426,253.34, 639,374.44 and 122,655.42 is: 183,981.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,253.34 : 639,374.44 = 122,655.42 : x
  2. Step 2: Convert to fraction form
    426,253.34/639,374.44 = 122,655.42/x
  3. Step 3: Cross multiply
    426,253.34x = 639,374.44 × 122,655.42
  4. Step 4: Simplify right side
    426,253.34x = 78,422,740,475.46
  5. Step 5: Solve for x
    x = 78,422,740,475.46/426,253.34
  6. Step 6: Final answer
    x = 183,981.53

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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.