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Finding the Fourth Proportional to 1,190.22, 1,642.50 and 659.09

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Solution

The fourth proportional to 1,190.22, 1,642.50 and 659.09 is: 909.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.22 : 1,642.50 = 659.09 : x
  2. Step 2: Convert to fraction form
    1,190.22/1,642.50 = 659.09/x
  3. Step 3: Cross multiply
    1,190.22x = 1,642.50 × 659.09
  4. Step 4: Simplify right side
    1,190.22x = 1,082,547.11
  5. Step 5: Solve for x
    x = 1,082,547.11/1,190.22
  6. Step 6: Final answer
    x = 909.54

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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.