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Finding the Fourth Proportional to 640,595.90, 960,893.85 and 404,983.10

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Solution

The fourth proportional to 640,595.90, 960,893.85 and 404,983.10 is: 607,474.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,595.90 : 960,893.85 = 404,983.10 : x
  2. Step 2: Convert to fraction form
    640,595.90/960,893.85 = 404,983.10/x
  3. Step 3: Cross multiply
    640,595.90x = 960,893.85 × 404,983.10
  4. Step 4: Simplify right side
    640,595.90x = 389,145,770,143.94
  5. Step 5: Solve for x
    x = 389,145,770,143.94/640,595.90
  6. Step 6: Final answer
    x = 607,474.65

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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.