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Finding the Fourth Proportional to 682.14, 946.52 and 654.72

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Solution

The fourth proportional to 682.14, 946.52 and 654.72 is: 908.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.14 : 946.52 = 654.72 : x
  2. Step 2: Convert to fraction form
    682.14/946.52 = 654.72/x
  3. Step 3: Cross multiply
    682.14x = 946.52 × 654.72
  4. Step 4: Simplify right side
    682.14x = 619,702.30
  5. Step 5: Solve for x
    x = 619,702.30/682.14
  6. Step 6: Final answer
    x = 908.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.