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Finding the Fourth Proportional to 1,190.77, 1,643.19 and 659.62

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Solution

The fourth proportional to 1,190.77, 1,643.19 and 659.62 is: 910.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.77 : 1,643.19 = 659.62 : x
  2. Step 2: Convert to fraction form
    1,190.77/1,643.19 = 659.62/x
  3. Step 3: Cross multiply
    1,190.77x = 1,643.19 × 659.62
  4. Step 4: Simplify right side
    1,190.77x = 1,083,880.99
  5. Step 5: Solve for x
    x = 1,083,880.99/1,190.77
  6. Step 6: Final answer
    x = 910.24

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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.