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Finding the Fourth Proportional to 287,339.88, 431,086.26 and 236,831.04

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Solution

The fourth proportional to 287,339.88, 431,086.26 and 236,831.04 is: 355,309.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,339.88 : 431,086.26 = 236,831.04 : x
  2. Step 2: Convert to fraction form
    287,339.88/431,086.26 = 236,831.04/x
  3. Step 3: Cross multiply
    287,339.88x = 431,086.26 × 236,831.04
  4. Step 4: Simplify right side
    287,339.88x = 102,094,607,285.51
  5. Step 5: Solve for x
    x = 102,094,607,285.51/287,339.88
  6. Step 6: Final answer
    x = 355,309.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.