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Finding the Fourth Proportional to 668.75, 922.48 and 403.16

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Solution

The fourth proportional to 668.75, 922.48 and 403.16 is: 556.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.75 : 922.48 = 403.16 : x
  2. Step 2: Convert to fraction form
    668.75/922.48 = 403.16/x
  3. Step 3: Cross multiply
    668.75x = 922.48 × 403.16
  4. Step 4: Simplify right side
    668.75x = 371,901.42
  5. Step 5: Solve for x
    x = 371,901.42/668.75
  6. Step 6: Final answer
    x = 556.12

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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.