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Finding the Fourth Proportional to 1,190.52, 1,642.85 and 659.39

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Solution

The fourth proportional to 1,190.52, 1,642.85 and 659.39 is: 909.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.52 : 1,642.85 = 659.39 : x
  2. Step 2: Convert to fraction form
    1,190.52/1,642.85 = 659.39/x
  3. Step 3: Cross multiply
    1,190.52x = 1,642.85 × 659.39
  4. Step 4: Simplify right side
    1,190.52x = 1,083,267.35
  5. Step 5: Solve for x
    x = 1,083,267.35/1,190.52
  6. Step 6: Final answer
    x = 909.91

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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.