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Finding the Fourth Proportional to 402,739.71, 555,865.36 and 255,469.31

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Solution

The fourth proportional to 402,739.71, 555,865.36 and 255,469.31 is: 352,601.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,739.71 : 555,865.36 = 255,469.31 : x
  2. Step 2: Convert to fraction form
    402,739.71/555,865.36 = 255,469.31/x
  3. Step 3: Cross multiply
    402,739.71x = 555,865.36 × 255,469.31
  4. Step 4: Simplify right side
    402,739.71x = 142,006,539,972.10
  5. Step 5: Solve for x
    x = 142,006,539,972.10/402,739.71
  6. Step 6: Final answer
    x = 352,601.29

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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.