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Finding the Fourth Proportional to 640,424.90, 959,600.55 and 403,343.30

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Solution

The fourth proportional to 640,424.90, 959,600.55 and 403,343.30 is: 604,361.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,424.90 : 959,600.55 = 403,343.30 : x
  2. Step 2: Convert to fraction form
    640,424.90/959,600.55 = 403,343.30/x
  3. Step 3: Cross multiply
    640,424.90x = 959,600.55 × 403,343.30
  4. Step 4: Simplify right side
    640,424.90x = 387,048,452,518.82
  5. Step 5: Solve for x
    x = 387,048,452,518.82/640,424.90
  6. Step 6: Final answer
    x = 604,361.97

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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.