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Finding the Fourth Proportional to 640,834.40, 960,214.80 and 403,752.80

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Solution

The fourth proportional to 640,834.40, 960,214.80 and 403,752.80 is: 604,975.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,834.40 : 960,214.80 = 403,752.80 : x
  2. Step 2: Convert to fraction form
    640,834.40/960,214.80 = 403,752.80/x
  3. Step 3: Cross multiply
    640,834.40x = 960,214.80 × 403,752.80
  4. Step 4: Simplify right side
    640,834.40x = 387,689,414,101.44
  5. Step 5: Solve for x
    x = 387,689,414,101.44/640,834.40
  6. Step 6: Final answer
    x = 604,975.97

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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.