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Finding the Fourth Proportional to 640,035.64, 883,249.68 and 349,651.20

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Solution

The fourth proportional to 640,035.64, 883,249.68 and 349,651.20 is: 482,518.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,035.64 : 883,249.68 = 349,651.20 : x
  2. Step 2: Convert to fraction form
    640,035.64/883,249.68 = 349,651.20/x
  3. Step 3: Cross multiply
    640,035.64x = 883,249.68 × 349,651.20
  4. Step 4: Simplify right side
    640,035.64x = 308,829,310,511.62
  5. Step 5: Solve for x
    x = 308,829,310,511.62/640,035.64
  6. Step 6: Final answer
    x = 482,518.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.