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Finding the Fourth Proportional to 389.09, 535.47 and 294.32

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Solution

The fourth proportional to 389.09, 535.47 and 294.32 is: 405.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.09 : 535.47 = 294.32 : x
  2. Step 2: Convert to fraction form
    389.09/535.47 = 294.32/x
  3. Step 3: Cross multiply
    389.09x = 535.47 × 294.32
  4. Step 4: Simplify right side
    389.09x = 157,599.53
  5. Step 5: Solve for x
    x = 157,599.53/389.09
  6. Step 6: Final answer
    x = 405.05

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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.