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Finding the Fourth Proportional to 1,190.24, 1,642.60 and 659.12

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Solution

The fourth proportional to 1,190.24, 1,642.60 and 659.12 is: 909.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.24 : 1,642.60 = 659.12 : x
  2. Step 2: Convert to fraction form
    1,190.24/1,642.60 = 659.12/x
  3. Step 3: Cross multiply
    1,190.24x = 1,642.60 × 659.12
  4. Step 4: Simplify right side
    1,190.24x = 1,082,670.51
  5. Step 5: Solve for x
    x = 1,082,670.51/1,190.24
  6. Step 6: Final answer
    x = 909.62

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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.