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Finding the Fourth Proportional to 607.69, 838.92 and 386.94

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Solution

The fourth proportional to 607.69, 838.92 and 386.94 is: 534.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.69 : 838.92 = 386.94 : x
  2. Step 2: Convert to fraction form
    607.69/838.92 = 386.94/x
  3. Step 3: Cross multiply
    607.69x = 838.92 × 386.94
  4. Step 4: Simplify right side
    607.69x = 324,611.13
  5. Step 5: Solve for x
    x = 324,611.13/607.69
  6. Step 6: Final answer
    x = 534.17

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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.