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Finding the Fourth Proportional to 640,343.36, 883,645.08 and 353,857.26

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Solution

The fourth proportional to 640,343.36, 883,645.08 and 353,857.26 is: 488,307.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,343.36 : 883,645.08 = 353,857.26 : x
  2. Step 2: Convert to fraction form
    640,343.36/883,645.08 = 353,857.26/x
  3. Step 3: Cross multiply
    640,343.36x = 883,645.08 × 353,857.26
  4. Step 4: Simplify right side
    640,343.36x = 312,684,226,821.28
  5. Step 5: Solve for x
    x = 312,684,226,821.28/640,343.36
  6. Step 6: Final answer
    x = 488,307.13

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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.