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Finding the Fourth Proportional to 1,561.93, 2,343.03 and 684.50

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Solution

The fourth proportional to 1,561.93, 2,343.03 and 684.50 is: 1,026.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.93 : 2,343.03 = 684.50 : x
  2. Step 2: Convert to fraction form
    1,561.93/2,343.03 = 684.50/x
  3. Step 3: Cross multiply
    1,561.93x = 2,343.03 × 684.50
  4. Step 4: Simplify right side
    1,561.93x = 1,603,804.04
  5. Step 5: Solve for x
    x = 1,603,804.04/1,561.93
  6. Step 6: Final answer
    x = 1,026.81

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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.