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Finding the Fourth Proportional to 426,254.34, 639,375.94 and 122,656.42

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Solution

The fourth proportional to 426,254.34, 639,375.94 and 122,656.42 is: 183,983.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,254.34 : 639,375.94 = 122,656.42 : x
  2. Step 2: Convert to fraction form
    426,254.34/639,375.94 = 122,656.42/x
  3. Step 3: Cross multiply
    426,254.34x = 639,375.94 × 122,656.42
  4. Step 4: Simplify right side
    426,254.34x = 78,423,563,834.53
  5. Step 5: Solve for x
    x = 78,423,563,834.53/426,254.34
  6. Step 6: Final answer
    x = 183,983.03

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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.