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Finding the Fourth Proportional to 375,428.90, 518,087.75 and 203,342.58

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Solution

The fourth proportional to 375,428.90, 518,087.75 and 203,342.58 is: 280,610.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,428.90 : 518,087.75 = 203,342.58 : x
  2. Step 2: Convert to fraction form
    375,428.90/518,087.75 = 203,342.58/x
  3. Step 3: Cross multiply
    375,428.90x = 518,087.75 × 203,342.58
  4. Step 4: Simplify right side
    375,428.90x = 105,349,300,259.75
  5. Step 5: Solve for x
    x = 105,349,300,259.75/375,428.90
  6. Step 6: Final answer
    x = 280,610.53

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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.