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Finding the Fourth Proportional to 639,679.44, 960,099.54 and 340,411.98

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Solution

The fourth proportional to 639,679.44, 960,099.54 and 340,411.98 is: 510,926.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,679.44 : 960,099.54 = 340,411.98 : x
  2. Step 2: Convert to fraction form
    639,679.44/960,099.54 = 340,411.98/x
  3. Step 3: Cross multiply
    639,679.44x = 960,099.54 × 340,411.98
  4. Step 4: Simplify right side
    639,679.44x = 326,829,385,408.49
  5. Step 5: Solve for x
    x = 326,829,385,408.49/639,679.44
  6. Step 6: Final answer
    x = 510,926.83

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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.