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Finding the Fourth Proportional to 703.28, 969.36 and 637.28

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Solution

The fourth proportional to 703.28, 969.36 and 637.28 is: 878.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.28 : 969.36 = 637.28 : x
  2. Step 2: Convert to fraction form
    703.28/969.36 = 637.28/x
  3. Step 3: Cross multiply
    703.28x = 969.36 × 637.28
  4. Step 4: Simplify right side
    703.28x = 617,753.74
  5. Step 5: Solve for x
    x = 617,753.74/703.28
  6. Step 6: Final answer
    x = 878.39

Related Problems

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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.