Home / 640,986.29-884,833.45-399,388.23

Finding the Fourth Proportional to 640,986.29, 884,833.45 and 399,388.23

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Solution

The fourth proportional to 640,986.29, 884,833.45 and 399,388.23 is: 551,325.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,986.29 : 884,833.45 = 399,388.23 : x
  2. Step 2: Convert to fraction form
    640,986.29/884,833.45 = 399,388.23/x
  3. Step 3: Cross multiply
    640,986.29x = 884,833.45 × 399,388.23
  4. Step 4: Simplify right side
    640,986.29x = 353,392,065,440.29
  5. Step 5: Solve for x
    x = 353,392,065,440.29/640,986.29
  6. Step 6: Final answer
    x = 551,325.47

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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.