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Finding the Fourth Proportional to 712.58, 983.83 and 637.66

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Solution

The fourth proportional to 712.58, 983.83 and 637.66 is: 880.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.58 : 983.83 = 637.66 : x
  2. Step 2: Convert to fraction form
    712.58/983.83 = 637.66/x
  3. Step 3: Cross multiply
    712.58x = 983.83 × 637.66
  4. Step 4: Simplify right side
    712.58x = 627,344.12
  5. Step 5: Solve for x
    x = 627,344.12/712.58
  6. Step 6: Final answer
    x = 880.38

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Double scale
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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.