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Finding the Fourth Proportional to 1,670.85, 2,305.77 and 914.64

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Solution

The fourth proportional to 1,670.85, 2,305.77 and 914.64 is: 1,262.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.85 : 2,305.77 = 914.64 : x
  2. Step 2: Convert to fraction form
    1,670.85/2,305.77 = 914.64/x
  3. Step 3: Cross multiply
    1,670.85x = 2,305.77 × 914.64
  4. Step 4: Simplify right side
    1,670.85x = 2,108,937.94
  5. Step 5: Solve for x
    x = 2,108,937.94/1,670.85
  6. Step 6: Final answer
    x = 1,262.20

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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.