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Finding the Fourth Proportional to 251,870.72, 375,963.22 and 221,978.07

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Solution

The fourth proportional to 251,870.72, 375,963.22 and 221,978.07 is: 331,342.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,870.72 : 375,963.22 = 221,978.07 : x
  2. Step 2: Convert to fraction form
    251,870.72/375,963.22 = 221,978.07/x
  3. Step 3: Cross multiply
    251,870.72x = 375,963.22 × 221,978.07
  4. Step 4: Simplify right side
    251,870.72x = 83,455,590,244.06
  5. Step 5: Solve for x
    x = 83,455,590,244.06/251,870.72
  6. Step 6: Final answer
    x = 331,342.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.