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Finding the Fourth Proportional to 375,579.72, 518,796.90 and 279,920.34

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Solution

The fourth proportional to 375,579.72, 518,796.90 and 279,920.34 is: 386,660.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,579.72 : 518,796.90 = 279,920.34 : x
  2. Step 2: Convert to fraction form
    375,579.72/518,796.90 = 279,920.34/x
  3. Step 3: Cross multiply
    375,579.72x = 518,796.90 × 279,920.34
  4. Step 4: Simplify right side
    375,579.72x = 145,221,804,638.95
  5. Step 5: Solve for x
    x = 145,221,804,638.95/375,579.72
  6. Step 6: Final answer
    x = 386,660.40

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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.