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Finding the Fourth Proportional to 1,433.39, 1,976.87 and 935.64

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Solution

The fourth proportional to 1,433.39, 1,976.87 and 935.64 is: 1,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433.39 : 1,976.87 = 935.64 : x
  2. Step 2: Convert to fraction form
    1,433.39/1,976.87 = 935.64/x
  3. Step 3: Cross multiply
    1,433.39x = 1,976.87 × 935.64
  4. Step 4: Simplify right side
    1,433.39x = 1,849,640.99
  5. Step 5: Solve for x
    x = 1,849,640.99/1,433.39
  6. Step 6: Final answer
    x = 1,290.40

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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.