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Finding the Fourth Proportional to 619.74, 855.02 and 357.62

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Solution

The fourth proportional to 619.74, 855.02 and 357.62 is: 493.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.74 : 855.02 = 357.62 : x
  2. Step 2: Convert to fraction form
    619.74/855.02 = 357.62/x
  3. Step 3: Cross multiply
    619.74x = 855.02 × 357.62
  4. Step 4: Simplify right side
    619.74x = 305,768.87
  5. Step 5: Solve for x
    x = 305,768.87/619.74
  6. Step 6: Final answer
    x = 493.38

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.