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Finding the Fourth Proportional to 960.32, 1,325.03 and 646.18

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Solution

The fourth proportional to 960.32, 1,325.03 and 646.18 is: 891.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.32 : 1,325.03 = 646.18 : x
  2. Step 2: Convert to fraction form
    960.32/1,325.03 = 646.18/x
  3. Step 3: Cross multiply
    960.32x = 1,325.03 × 646.18
  4. Step 4: Simplify right side
    960.32x = 856,201.34
  5. Step 5: Solve for x
    x = 856,201.34/960.32
  6. Step 6: Final answer
    x = 891.58

Related Problems

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Half scale
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Double scale
Find fourth proportional to 961.32, 1,326.40 and 647.18
Similar ratio
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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.