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Finding the Fourth Proportional to 1,086.76, 1,626.45 and 654.22

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Solution

The fourth proportional to 1,086.76, 1,626.45 and 654.22 is: 979.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.76 : 1,626.45 = 654.22 : x
  2. Step 2: Convert to fraction form
    1,086.76/1,626.45 = 654.22/x
  3. Step 3: Cross multiply
    1,086.76x = 1,626.45 × 654.22
  4. Step 4: Simplify right side
    1,086.76x = 1,064,056.12
  5. Step 5: Solve for x
    x = 1,064,056.12/1,086.76
  6. Step 6: Final answer
    x = 979.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.