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Finding the Fourth Proportional to 1,196.80, 1,651.68 and 901.60

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Solution

The fourth proportional to 1,196.80, 1,651.68 and 901.60 is: 1,244.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,196.80 : 1,651.68 = 901.60 : x
  2. Step 2: Convert to fraction form
    1,196.80/1,651.68 = 901.60/x
  3. Step 3: Cross multiply
    1,196.80x = 1,651.68 × 901.60
  4. Step 4: Simplify right side
    1,196.80x = 1,489,154.69
  5. Step 5: Solve for x
    x = 1,489,154.69/1,196.80
  6. Step 6: Final answer
    x = 1,244.28

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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.