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Finding the Fourth Proportional to 640,418.47, 958,634.80 and 403,262.93

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Solution

The fourth proportional to 640,418.47, 958,634.80 and 403,262.93 is: 603,639.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,418.47 : 958,634.80 = 403,262.93 : x
  2. Step 2: Convert to fraction form
    640,418.47/958,634.80 = 403,262.93/x
  3. Step 3: Cross multiply
    640,418.47x = 958,634.80 × 403,262.93
  4. Step 4: Simplify right side
    640,418.47x = 386,581,879,636.39
  5. Step 5: Solve for x
    x = 386,581,879,636.39/640,418.47
  6. Step 6: Final answer
    x = 603,639.49

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.