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Finding the Fourth Proportional to 511.40, 705.57 and 454.70

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Solution

The fourth proportional to 511.40, 705.57 and 454.70 is: 627.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.40 : 705.57 = 454.70 : x
  2. Step 2: Convert to fraction form
    511.40/705.57 = 454.70/x
  3. Step 3: Cross multiply
    511.40x = 705.57 × 454.70
  4. Step 4: Simplify right side
    511.40x = 320,822.68
  5. Step 5: Solve for x
    x = 320,822.68/511.40
  6. Step 6: Final answer
    x = 627.34

Related Problems

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Double scale
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Similar ratio
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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.