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Finding the Fourth Proportional to 389.23, 536.84 and 347.26

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Solution

The fourth proportional to 389.23, 536.84 and 347.26 is: 478.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.23 : 536.84 = 347.26 : x
  2. Step 2: Convert to fraction form
    389.23/536.84 = 347.26/x
  3. Step 3: Cross multiply
    389.23x = 536.84 × 347.26
  4. Step 4: Simplify right side
    389.23x = 186,418.64
  5. Step 5: Solve for x
    x = 186,418.64/389.23
  6. Step 6: Final answer
    x = 478.95

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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.