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Finding the Fourth Proportional to 640,299.27, 883,536.08 and 353,780.13

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Solution

The fourth proportional to 640,299.27, 883,536.08 and 353,780.13 is: 488,174.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,299.27 : 883,536.08 = 353,780.13 : x
  2. Step 2: Convert to fraction form
    640,299.27/883,536.08 = 353,780.13/x
  3. Step 3: Cross multiply
    640,299.27x = 883,536.08 × 353,780.13
  4. Step 4: Simplify right side
    640,299.27x = 312,577,507,473.19
  5. Step 5: Solve for x
    x = 312,577,507,473.19/640,299.27
  6. Step 6: Final answer
    x = 488,174.08

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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.