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Finding the Fourth Proportional to 1,670.38, 2,305.06 and 914.15

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Solution

The fourth proportional to 1,670.38, 2,305.06 and 914.15 is: 1,261.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.38 : 2,305.06 = 914.15 : x
  2. Step 2: Convert to fraction form
    1,670.38/2,305.06 = 914.15/x
  3. Step 3: Cross multiply
    1,670.38x = 2,305.06 × 914.15
  4. Step 4: Simplify right side
    1,670.38x = 2,107,170.60
  5. Step 5: Solve for x
    x = 2,107,170.60/1,670.38
  6. Step 6: Final answer
    x = 1,261.49

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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.