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Finding the Fourth Proportional to 375,555, 518,265.90 and 216,579

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Solution

The fourth proportional to 375,555, 518,265.90 and 216,579 is: 298,879.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,555 : 518,265.90 = 216,579 : x
  2. Step 2: Convert to fraction form
    375,555/518,265.90 = 216,579/x
  3. Step 3: Cross multiply
    375,555x = 518,265.90 × 216,579
  4. Step 4: Simplify right side
    375,555x = 112,245,510,356.10
  5. Step 5: Solve for x
    x = 112,245,510,356.10/375,555
  6. Step 6: Final answer
    x = 298,879.02

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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.