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Finding the Fourth Proportional to 554.72, 831.62 and 478.58

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Solution

The fourth proportional to 554.72, 831.62 and 478.58 is: 717.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.72 : 831.62 = 478.58 : x
  2. Step 2: Convert to fraction form
    554.72/831.62 = 478.58/x
  3. Step 3: Cross multiply
    554.72x = 831.62 × 478.58
  4. Step 4: Simplify right side
    554.72x = 397,996.70
  5. Step 5: Solve for x
    x = 397,996.70/554.72
  6. Step 6: Final answer
    x = 717.47

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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.