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Finding the Fourth Proportional to 2,157.16, 3,234.95 and 770.13

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Solution

The fourth proportional to 2,157.16, 3,234.95 and 770.13 is: 1,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.16 : 3,234.95 = 770.13 : x
  2. Step 2: Convert to fraction form
    2,157.16/3,234.95 = 770.13/x
  3. Step 3: Cross multiply
    2,157.16x = 3,234.95 × 770.13
  4. Step 4: Simplify right side
    2,157.16x = 2,491,312.02
  5. Step 5: Solve for x
    x = 2,491,312.02/2,157.16
  6. Step 6: Final answer
    x = 1,154.90

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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.