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Finding the Fourth Proportional to 770.10, 1,156.05 and 441.30

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Solution

The fourth proportional to 770.10, 1,156.05 and 441.30 is: 662.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.10 : 1,156.05 = 441.30 : x
  2. Step 2: Convert to fraction form
    770.10/1,156.05 = 441.30/x
  3. Step 3: Cross multiply
    770.10x = 1,156.05 × 441.30
  4. Step 4: Simplify right side
    770.10x = 510,164.87
  5. Step 5: Solve for x
    x = 510,164.87/770.10
  6. Step 6: Final answer
    x = 662.47

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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.