Home / 1,191.90-1,643.04-1,170.06

Finding the Fourth Proportional to 1,191.90, 1,643.04 and 1,170.06

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Solution

The fourth proportional to 1,191.90, 1,643.04 and 1,170.06 is: 1,612.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.90 : 1,643.04 = 1,170.06 : x
  2. Step 2: Convert to fraction form
    1,191.90/1,643.04 = 1,170.06/x
  3. Step 3: Cross multiply
    1,191.90x = 1,643.04 × 1,170.06
  4. Step 4: Simplify right side
    1,191.90x = 1,922,455.38
  5. Step 5: Solve for x
    x = 1,922,455.38/1,191.90
  6. Step 6: Final answer
    x = 1,612.93

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Double scale
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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.