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Finding the Fourth Proportional to 640,407.78, 958,618.77 and 403,252.23

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Solution

The fourth proportional to 640,407.78, 958,618.77 and 403,252.23 is: 603,623.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,407.78 : 958,618.77 = 403,252.23 : x
  2. Step 2: Convert to fraction form
    640,407.78/958,618.77 = 403,252.23/x
  3. Step 3: Cross multiply
    640,407.78x = 958,618.77 × 403,252.23
  4. Step 4: Simplify right side
    640,407.78x = 386,565,158,804.98
  5. Step 5: Solve for x
    x = 386,565,158,804.98/640,407.78
  6. Step 6: Final answer
    x = 603,623.46

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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.