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Finding the Fourth Proportional to 714.17, 984.60 and 641.27

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Solution

The fourth proportional to 714.17, 984.60 and 641.27 is: 884.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.17 : 984.60 = 641.27 : x
  2. Step 2: Convert to fraction form
    714.17/984.60 = 641.27/x
  3. Step 3: Cross multiply
    714.17x = 984.60 × 641.27
  4. Step 4: Simplify right side
    714.17x = 631,389.52
  5. Step 5: Solve for x
    x = 631,389.52/714.17
  6. Step 6: Final answer
    x = 884.09

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1.5x scale

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.