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Finding the Fourth Proportional to 640,053.29, 883,276.65 and 349,668.90

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Solution

The fourth proportional to 640,053.29, 883,276.65 and 349,668.90 is: 482,544.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,053.29 : 883,276.65 = 349,668.90 : x
  2. Step 2: Convert to fraction form
    640,053.29/883,276.65 = 349,668.90/x
  3. Step 3: Cross multiply
    640,053.29x = 883,276.65 × 349,668.90
  4. Step 4: Simplify right side
    640,053.29x = 308,854,374,601.19
  5. Step 5: Solve for x
    x = 308,854,374,601.19/640,053.29
  6. Step 6: Final answer
    x = 482,544.78

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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.