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Finding the Fourth Proportional to 607.38, 838.70 and 386.72

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Solution

The fourth proportional to 607.38, 838.70 and 386.72 is: 534.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.38 : 838.70 = 386.72 : x
  2. Step 2: Convert to fraction form
    607.38/838.70 = 386.72/x
  3. Step 3: Cross multiply
    607.38x = 838.70 × 386.72
  4. Step 4: Simplify right side
    607.38x = 324,342.06
  5. Step 5: Solve for x
    x = 324,342.06/607.38
  6. Step 6: Final answer
    x = 534.00

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Double scale
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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.