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Finding the Fourth Proportional to 622.38, 857.49 and 512.12

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Solution

The fourth proportional to 622.38, 857.49 and 512.12 is: 705.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.38 : 857.49 = 512.12 : x
  2. Step 2: Convert to fraction form
    622.38/857.49 = 512.12/x
  3. Step 3: Cross multiply
    622.38x = 857.49 × 512.12
  4. Step 4: Simplify right side
    622.38x = 439,138.00
  5. Step 5: Solve for x
    x = 439,138.00/622.38
  6. Step 6: Final answer
    x = 705.57

Related Problems

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Half scale
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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.