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Finding the Fourth Proportional to 640,580.20, 960,980.82 and 261,706.84

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Solution

The fourth proportional to 640,580.20, 960,980.82 and 261,706.84 is: 392,605.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,580.20 : 960,980.82 = 261,706.84 : x
  2. Step 2: Convert to fraction form
    640,580.20/960,980.82 = 261,706.84/x
  3. Step 3: Cross multiply
    640,580.20x = 960,980.82 × 261,706.84
  4. Step 4: Simplify right side
    640,580.20x = 251,495,253,702.81
  5. Step 5: Solve for x
    x = 251,495,253,702.81/640,580.20
  6. Step 6: Final answer
    x = 392,605.41

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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.