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Finding the Fourth Proportional to 375,713.12, 518,490.38 and 203,636.58

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Solution

The fourth proportional to 375,713.12, 518,490.38 and 203,636.58 is: 281,021.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,713.12 : 518,490.38 = 203,636.58 : x
  2. Step 2: Convert to fraction form
    375,713.12/518,490.38 = 203,636.58/x
  3. Step 3: Cross multiply
    375,713.12x = 518,490.38 × 203,636.58
  4. Step 4: Simplify right side
    375,713.12x = 105,583,607,746.10
  5. Step 5: Solve for x
    x = 105,583,607,746.10/375,713.12
  6. Step 6: Final answer
    x = 281,021.88

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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.