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Finding the Fourth Proportional to 770.31, 1,155.94 and 283.37

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Solution

The fourth proportional to 770.31, 1,155.94 and 283.37 is: 425.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.31 : 1,155.94 = 283.37 : x
  2. Step 2: Convert to fraction form
    770.31/1,155.94 = 283.37/x
  3. Step 3: Cross multiply
    770.31x = 1,155.94 × 283.37
  4. Step 4: Simplify right side
    770.31x = 327,552.23
  5. Step 5: Solve for x
    x = 327,552.23/770.31
  6. Step 6: Final answer
    x = 425.22

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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.