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Finding the Fourth Proportional to 949.18, 1,309.11 and 654.38

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Solution

The fourth proportional to 949.18, 1,309.11 and 654.38 is: 902.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.18 : 1,309.11 = 654.38 : x
  2. Step 2: Convert to fraction form
    949.18/1,309.11 = 654.38/x
  3. Step 3: Cross multiply
    949.18x = 1,309.11 × 654.38
  4. Step 4: Simplify right side
    949.18x = 856,655.40
  5. Step 5: Solve for x
    x = 856,655.40/949.18
  6. Step 6: Final answer
    x = 902.52

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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.