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Finding the Fourth Proportional to 955.36, 1,431.56 and 646.12

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Solution

The fourth proportional to 955.36, 1,431.56 and 646.12 is: 968.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.36 : 1,431.56 = 646.12 : x
  2. Step 2: Convert to fraction form
    955.36/1,431.56 = 646.12/x
  3. Step 3: Cross multiply
    955.36x = 1,431.56 × 646.12
  4. Step 4: Simplify right side
    955.36x = 924,959.55
  5. Step 5: Solve for x
    x = 924,959.55/955.36
  6. Step 6: Final answer
    x = 968.18

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Double scale
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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.