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Finding the Fourth Proportional to 639,702.68, 960,134.40 and 340,435.24

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Solution

The fourth proportional to 639,702.68, 960,134.40 and 340,435.24 is: 510,961.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,702.68 : 960,134.40 = 340,435.24 : x
  2. Step 2: Convert to fraction form
    639,702.68/960,134.40 = 340,435.24/x
  3. Step 3: Cross multiply
    639,702.68x = 960,134.40 × 340,435.24
  4. Step 4: Simplify right side
    639,702.68x = 326,863,584,896.26
  5. Step 5: Solve for x
    x = 326,863,584,896.26/639,702.68
  6. Step 6: Final answer
    x = 510,961.73

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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.