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Finding the Fourth Proportional to 965.99, 1,448.28 and 619.72

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Solution

The fourth proportional to 965.99, 1,448.28 and 619.72 is: 929.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.99 : 1,448.28 = 619.72 : x
  2. Step 2: Convert to fraction form
    965.99/1,448.28 = 619.72/x
  3. Step 3: Cross multiply
    965.99x = 1,448.28 × 619.72
  4. Step 4: Simplify right side
    965.99x = 897,524.46
  5. Step 5: Solve for x
    x = 897,524.46/965.99
  6. Step 6: Final answer
    x = 929.12

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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.