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Finding the Fourth Proportional to 640,408.66, 958,620.08 and 403,253.11

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Solution

The fourth proportional to 640,408.66, 958,620.08 and 403,253.11 is: 603,624.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,408.66 : 958,620.08 = 403,253.11 : x
  2. Step 2: Convert to fraction form
    640,408.66/958,620.08 = 403,253.11/x
  3. Step 3: Cross multiply
    640,408.66x = 958,620.08 × 403,253.11
  4. Step 4: Simplify right side
    640,408.66x = 386,566,528,568.45
  5. Step 5: Solve for x
    x = 386,566,528,568.45/640,408.66
  6. Step 6: Final answer
    x = 603,624.77

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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.