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Finding the Fourth Proportional to 959.61, 1,323.63 and 628.32

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Solution

The fourth proportional to 959.61, 1,323.63 and 628.32 is: 866.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.61 : 1,323.63 = 628.32 : x
  2. Step 2: Convert to fraction form
    959.61/1,323.63 = 628.32/x
  3. Step 3: Cross multiply
    959.61x = 1,323.63 × 628.32
  4. Step 4: Simplify right side
    959.61x = 831,663.20
  5. Step 5: Solve for x
    x = 831,663.20/959.61
  6. Step 6: Final answer
    x = 866.67

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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.