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Finding the Fourth Proportional to 653.03, 979.67 and 214.31

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Solution

The fourth proportional to 653.03, 979.67 and 214.31 is: 321.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.03 : 979.67 = 214.31 : x
  2. Step 2: Convert to fraction form
    653.03/979.67 = 214.31/x
  3. Step 3: Cross multiply
    653.03x = 979.67 × 214.31
  4. Step 4: Simplify right side
    653.03x = 209,948.72
  5. Step 5: Solve for x
    x = 209,948.72/653.03
  6. Step 6: Final answer
    x = 321.50

Related Problems

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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.