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Finding the Fourth Proportional to 965.61, 1,448.73 and 380.88

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Solution

The fourth proportional to 965.61, 1,448.73 and 380.88 is: 571.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.61 : 1,448.73 = 380.88 : x
  2. Step 2: Convert to fraction form
    965.61/1,448.73 = 380.88/x
  3. Step 3: Cross multiply
    965.61x = 1,448.73 × 380.88
  4. Step 4: Simplify right side
    965.61x = 551,792.28
  5. Step 5: Solve for x
    x = 551,792.28/965.61
  6. Step 6: Final answer
    x = 571.44

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Double scale
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1.5x scale

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.