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Finding the Fourth Proportional to 770.16, 1,152.72 and 635.28

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Solution

The fourth proportional to 770.16, 1,152.72 and 635.28 is: 950.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.16 : 1,152.72 = 635.28 : x
  2. Step 2: Convert to fraction form
    770.16/1,152.72 = 635.28/x
  3. Step 3: Cross multiply
    770.16x = 1,152.72 × 635.28
  4. Step 4: Simplify right side
    770.16x = 732,299.96
  5. Step 5: Solve for x
    x = 732,299.96/770.16
  6. Step 6: Final answer
    x = 950.84

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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.