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Finding the Fourth Proportional to 611.60, 917.58 and 303.54

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Solution

The fourth proportional to 611.60, 917.58 and 303.54 is: 455.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.60 : 917.58 = 303.54 : x
  2. Step 2: Convert to fraction form
    611.60/917.58 = 303.54/x
  3. Step 3: Cross multiply
    611.60x = 917.58 × 303.54
  4. Step 4: Simplify right side
    611.60x = 278,522.23
  5. Step 5: Solve for x
    x = 278,522.23/611.60
  6. Step 6: Final answer
    x = 455.40

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