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Finding the Fourth Proportional to 653.10, 979.65 and 190.86

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Solution

The fourth proportional to 653.10, 979.65 and 190.86 is: 286.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.10 : 979.65 = 190.86 : x
  2. Step 2: Convert to fraction form
    653.10/979.65 = 190.86/x
  3. Step 3: Cross multiply
    653.10x = 979.65 × 190.86
  4. Step 4: Simplify right side
    653.10x = 186,976.00
  5. Step 5: Solve for x
    x = 186,976.00/653.10
  6. Step 6: Final answer
    x = 286.29

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Half scale
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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.