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Finding the Fourth Proportional to 639,702.26, 959,885.49 and 260,900.90

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Solution

The fourth proportional to 639,702.26, 959,885.49 and 260,900.90 is: 391,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,702.26 : 959,885.49 = 260,900.90 : x
  2. Step 2: Convert to fraction form
    639,702.26/959,885.49 = 260,900.90/x
  3. Step 3: Cross multiply
    639,702.26x = 959,885.49 × 260,900.90
  4. Step 4: Simplify right side
    639,702.26x = 250,434,988,237.94
  5. Step 5: Solve for x
    x = 250,434,988,237.94/639,702.26
  6. Step 6: Final answer
    x = 391,486.80

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1.5x scale

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.