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Finding the Fourth Proportional to 653.00, 979.61 and 220.13

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Solution

The fourth proportional to 653.00, 979.61 and 220.13 is: 330.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.00 : 979.61 = 220.13 : x
  2. Step 2: Convert to fraction form
    653.00/979.61 = 220.13/x
  3. Step 3: Cross multiply
    653.00x = 979.61 × 220.13
  4. Step 4: Simplify right side
    653.00x = 215,635.55
  5. Step 5: Solve for x
    x = 215,635.55/653.00
  6. Step 6: Final answer
    x = 330.22

Related Problems

Find fourth proportional to 326.50, 489.80 and 110.06
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.