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Finding the Fourth Proportional to 554.31, 831.58 and 189.36

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Solution

The fourth proportional to 554.31, 831.58 and 189.36 is: 284.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.31 : 831.58 = 189.36 : x
  2. Step 2: Convert to fraction form
    554.31/831.58 = 189.36/x
  3. Step 3: Cross multiply
    554.31x = 831.58 × 189.36
  4. Step 4: Simplify right side
    554.31x = 157,467.52
  5. Step 5: Solve for x
    x = 157,467.52/554.31
  6. Step 6: Final answer
    x = 284.08

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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.