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Finding the Fourth Proportional to 612.55, 918.93 and 201.65

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Solution

The fourth proportional to 612.55, 918.93 and 201.65 is: 302.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.55 : 918.93 = 201.65 : x
  2. Step 2: Convert to fraction form
    612.55/918.93 = 201.65/x
  3. Step 3: Cross multiply
    612.55x = 918.93 × 201.65
  4. Step 4: Simplify right side
    612.55x = 185,296.63
  5. Step 5: Solve for x
    x = 185,296.63/612.55
  6. Step 6: Final answer
    x = 302.50

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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.