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Finding the Fourth Proportional to 965.37, 1,448.55 and 618.90

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Solution

The fourth proportional to 965.37, 1,448.55 and 618.90 is: 928.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.37 : 1,448.55 = 618.90 : x
  2. Step 2: Convert to fraction form
    965.37/1,448.55 = 618.90/x
  3. Step 3: Cross multiply
    965.37x = 1,448.55 × 618.90
  4. Step 4: Simplify right side
    965.37x = 896,507.60
  5. Step 5: Solve for x
    x = 896,507.60/965.37
  6. Step 6: Final answer
    x = 928.67

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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.