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Finding the Fourth Proportional to 420.12, 579.58 and 262.69

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Solution

The fourth proportional to 420.12, 579.58 and 262.69 is: 362.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.12 : 579.58 = 262.69 : x
  2. Step 2: Convert to fraction form
    420.12/579.58 = 262.69/x
  3. Step 3: Cross multiply
    420.12x = 579.58 × 262.69
  4. Step 4: Simplify right side
    420.12x = 152,247.76
  5. Step 5: Solve for x
    x = 152,247.76/420.12
  6. Step 6: Final answer
    x = 362.39

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.