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Finding the Fourth Proportional to 612.70, 918.52 and 201.72

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Solution

The fourth proportional to 612.70, 918.52 and 201.72 is: 302.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.70 : 918.52 = 201.72 : x
  2. Step 2: Convert to fraction form
    612.70/918.52 = 201.72/x
  3. Step 3: Cross multiply
    612.70x = 918.52 × 201.72
  4. Step 4: Simplify right side
    612.70x = 185,283.35
  5. Step 5: Solve for x
    x = 185,283.35/612.70
  6. Step 6: Final answer
    x = 302.41

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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.