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Finding the Fourth Proportional to 953.82, 1,315.76 and 617.60

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Solution

The fourth proportional to 953.82, 1,315.76 and 617.60 is: 851.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.82 : 1,315.76 = 617.60 : x
  2. Step 2: Convert to fraction form
    953.82/1,315.76 = 617.60/x
  3. Step 3: Cross multiply
    953.82x = 1,315.76 × 617.60
  4. Step 4: Simplify right side
    953.82x = 812,613.38
  5. Step 5: Solve for x
    x = 812,613.38/953.82
  6. Step 6: Final answer
    x = 851.96

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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.