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Finding the Fourth Proportional to 536.90, 805.39 and 259.17

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Solution

The fourth proportional to 536.90, 805.39 and 259.17 is: 388.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.90 : 805.39 = 259.17 : x
  2. Step 2: Convert to fraction form
    536.90/805.39 = 259.17/x
  3. Step 3: Cross multiply
    536.90x = 805.39 × 259.17
  4. Step 4: Simplify right side
    536.90x = 208,730.72
  5. Step 5: Solve for x
    x = 208,730.72/536.90
  6. Step 6: Final answer
    x = 388.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.