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Finding the Fourth Proportional to 960.31, 1,323.93 and 628.21

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Solution

The fourth proportional to 960.31, 1,323.93 and 628.21 is: 866.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.31 : 1,323.93 = 628.21 : x
  2. Step 2: Convert to fraction form
    960.31/1,323.93 = 628.21/x
  3. Step 3: Cross multiply
    960.31x = 1,323.93 × 628.21
  4. Step 4: Simplify right side
    960.31x = 831,706.07
  5. Step 5: Solve for x
    x = 831,706.07/960.31
  6. Step 6: Final answer
    x = 866.08

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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.