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Finding the Fourth Proportional to 965.45, 1,330.99 and 611.19

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Solution

The fourth proportional to 965.45, 1,330.99 and 611.19 is: 842.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.45 : 1,330.99 = 611.19 : x
  2. Step 2: Convert to fraction form
    965.45/1,330.99 = 611.19/x
  3. Step 3: Cross multiply
    965.45x = 1,330.99 × 611.19
  4. Step 4: Simplify right side
    965.45x = 813,487.78
  5. Step 5: Solve for x
    x = 813,487.78/965.45
  6. Step 6: Final answer
    x = 842.60

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.