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Finding the Fourth Proportional to 682.66, 1,023.53 and 646.13

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Solution

The fourth proportional to 682.66, 1,023.53 and 646.13 is: 968.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.66 : 1,023.53 = 646.13 : x
  2. Step 2: Convert to fraction form
    682.66/1,023.53 = 646.13/x
  3. Step 3: Cross multiply
    682.66x = 1,023.53 × 646.13
  4. Step 4: Simplify right side
    682.66x = 661,337.61
  5. Step 5: Solve for x
    x = 661,337.61/682.66
  6. Step 6: Final answer
    x = 968.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.