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Finding the Fourth Proportional to 534.28, 736.98 and 386.68

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Solution

The fourth proportional to 534.28, 736.98 and 386.68 is: 533.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.28 : 736.98 = 386.68 : x
  2. Step 2: Convert to fraction form
    534.28/736.98 = 386.68/x
  3. Step 3: Cross multiply
    534.28x = 736.98 × 386.68
  4. Step 4: Simplify right side
    534.28x = 284,975.43
  5. Step 5: Solve for x
    x = 284,975.43/534.28
  6. Step 6: Final answer
    x = 533.38

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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.