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Finding the Fourth Proportional to 1,736.66, 2,605.90 and 812.68

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Solution

The fourth proportional to 1,736.66, 2,605.90 and 812.68 is: 1,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,736.66 : 2,605.90 = 812.68 : x
  2. Step 2: Convert to fraction form
    1,736.66/2,605.90 = 812.68/x
  3. Step 3: Cross multiply
    1,736.66x = 2,605.90 × 812.68
  4. Step 4: Simplify right side
    1,736.66x = 2,117,762.81
  5. Step 5: Solve for x
    x = 2,117,762.81/1,736.66
  6. Step 6: Final answer
    x = 1,219.45

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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.