Home / 640,513.40-959,733.30-403,431.80

Finding the Fourth Proportional to 640,513.40, 959,733.30 and 403,431.80

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Solution

The fourth proportional to 640,513.40, 959,733.30 and 403,431.80 is: 604,494.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,513.40 : 959,733.30 = 403,431.80 : x
  2. Step 2: Convert to fraction form
    640,513.40/959,733.30 = 403,431.80/x
  3. Step 3: Cross multiply
    640,513.40x = 959,733.30 × 403,431.80
  4. Step 4: Simplify right side
    640,513.40x = 387,186,932,738.94
  5. Step 5: Solve for x
    x = 387,186,932,738.94/640,513.40
  6. Step 6: Final answer
    x = 604,494.66

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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.