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Finding the Fourth Proportional to 1,168.48, 1,611.84 and 670.90

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Solution

The fourth proportional to 1,168.48, 1,611.84 and 670.90 is: 925.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.48 : 1,611.84 = 670.90 : x
  2. Step 2: Convert to fraction form
    1,168.48/1,611.84 = 670.90/x
  3. Step 3: Cross multiply
    1,168.48x = 1,611.84 × 670.90
  4. Step 4: Simplify right side
    1,168.48x = 1,081,383.46
  5. Step 5: Solve for x
    x = 1,081,383.46/1,168.48
  6. Step 6: Final answer
    x = 925.46

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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.