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Finding the Fourth Proportional to 640,285.90, 960,147.41 and 340,695.21

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Solution

The fourth proportional to 640,285.90, 960,147.41 and 340,695.21 is: 510,893.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,285.90 : 960,147.41 = 340,695.21 : x
  2. Step 2: Convert to fraction form
    640,285.90/960,147.41 = 340,695.21/x
  3. Step 3: Cross multiply
    640,285.90x = 960,147.41 × 340,695.21
  4. Step 4: Simplify right side
    640,285.90x = 327,117,625,377.98
  5. Step 5: Solve for x
    x = 327,117,625,377.98/640,285.90
  6. Step 6: Final answer
    x = 510,893.07

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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.