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Finding the Fourth Proportional to 1,670.51, 2,505.79 and 746.12

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Solution

The fourth proportional to 1,670.51, 2,505.79 and 746.12 is: 1,119.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.51 : 2,505.79 = 746.12 : x
  2. Step 2: Convert to fraction form
    1,670.51/2,505.79 = 746.12/x
  3. Step 3: Cross multiply
    1,670.51x = 2,505.79 × 746.12
  4. Step 4: Simplify right side
    1,670.51x = 1,869,603.78
  5. Step 5: Solve for x
    x = 1,869,603.78/1,670.51
  6. Step 6: Final answer
    x = 1,119.18

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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.