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Finding the Fourth Proportional to 714.58, 986.03 and 415.91

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Solution

The fourth proportional to 714.58, 986.03 and 415.91 is: 573.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.58 : 986.03 = 415.91 : x
  2. Step 2: Convert to fraction form
    714.58/986.03 = 415.91/x
  3. Step 3: Cross multiply
    714.58x = 986.03 × 415.91
  4. Step 4: Simplify right side
    714.58x = 410,099.74
  5. Step 5: Solve for x
    x = 410,099.74/714.58
  6. Step 6: Final answer
    x = 573.90

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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.