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Finding the Fourth Proportional to 628.14, 863.55 and 624.16

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Solution

The fourth proportional to 628.14, 863.55 and 624.16 is: 858.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.14 : 863.55 = 624.16 : x
  2. Step 2: Convert to fraction form
    628.14/863.55 = 624.16/x
  3. Step 3: Cross multiply
    628.14x = 863.55 × 624.16
  4. Step 4: Simplify right side
    628.14x = 538,993.37
  5. Step 5: Solve for x
    x = 538,993.37/628.14
  6. Step 6: Final answer
    x = 858.08

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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 (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.