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Finding the Fourth Proportional to 331,603.88, 457,687.16 and 210,721.55

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Solution

The fourth proportional to 331,603.88, 457,687.16 and 210,721.55 is: 290,842.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,603.88 : 457,687.16 = 210,721.55 : x
  2. Step 2: Convert to fraction form
    331,603.88/457,687.16 = 210,721.55/x
  3. Step 3: Cross multiply
    331,603.88x = 457,687.16 × 210,721.55
  4. Step 4: Simplify right side
    331,603.88x = 96,444,547,792.95
  5. Step 5: Solve for x
    x = 96,444,547,792.95/331,603.88
  6. Step 6: Final answer
    x = 290,842.64

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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.