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Finding the Fourth Proportional to 1,190.46, 1,643.01 and 859.35

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Solution

The fourth proportional to 1,190.46, 1,643.01 and 859.35 is: 1,186.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.46 : 1,643.01 = 859.35 : x
  2. Step 2: Convert to fraction form
    1,190.46/1,643.01 = 859.35/x
  3. Step 3: Cross multiply
    1,190.46x = 1,643.01 × 859.35
  4. Step 4: Simplify right side
    1,190.46x = 1,411,920.64
  5. Step 5: Solve for x
    x = 1,411,920.64/1,190.46
  6. Step 6: Final answer
    x = 1,186.03

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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.