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Finding the Fourth Proportional to 953.80, 1,315.83 and 674.27

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Solution

The fourth proportional to 953.80, 1,315.83 and 674.27 is: 930.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.80 : 1,315.83 = 674.27 : x
  2. Step 2: Convert to fraction form
    953.80/1,315.83 = 674.27/x
  3. Step 3: Cross multiply
    953.80x = 1,315.83 × 674.27
  4. Step 4: Simplify right side
    953.80x = 887,224.69
  5. Step 5: Solve for x
    x = 887,224.69/953.80
  6. Step 6: Final answer
    x = 930.20

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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.