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Finding the Fourth Proportional to 965.15, 1,331.47 and 654.11

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Solution

The fourth proportional to 965.15, 1,331.47 and 654.11 is: 902.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.15 : 1,331.47 = 654.11 : x
  2. Step 2: Convert to fraction form
    965.15/1,331.47 = 654.11/x
  3. Step 3: Cross multiply
    965.15x = 1,331.47 × 654.11
  4. Step 4: Simplify right side
    965.15x = 870,927.84
  5. Step 5: Solve for x
    x = 870,927.84/965.15
  6. Step 6: Final answer
    x = 902.38

Related Problems

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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.