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Finding the Fourth Proportional to 1,190.39, 1,642.84 and 693.08

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Solution

The fourth proportional to 1,190.39, 1,642.84 and 693.08 is: 956.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.39 : 1,642.84 = 693.08 : x
  2. Step 2: Convert to fraction form
    1,190.39/1,642.84 = 693.08/x
  3. Step 3: Cross multiply
    1,190.39x = 1,642.84 × 693.08
  4. Step 4: Simplify right side
    1,190.39x = 1,138,611.33
  5. Step 5: Solve for x
    x = 1,138,611.33/1,190.39
  6. Step 6: Final answer
    x = 956.50

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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.