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Finding the Fourth Proportional to 714.08, 985.36 and 403.36

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Solution

The fourth proportional to 714.08, 985.36 and 403.36 is: 556.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.08 : 985.36 = 403.36 : x
  2. Step 2: Convert to fraction form
    714.08/985.36 = 403.36/x
  3. Step 3: Cross multiply
    714.08x = 985.36 × 403.36
  4. Step 4: Simplify right side
    714.08x = 397,454.81
  5. Step 5: Solve for x
    x = 397,454.81/714.08
  6. Step 6: Final answer
    x = 556.60

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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.