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Finding the Fourth Proportional to 1,239.93, 1,859.94 and 374.25

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Solution

The fourth proportional to 1,239.93, 1,859.94 and 374.25 is: 561.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.93 : 1,859.94 = 374.25 : x
  2. Step 2: Convert to fraction form
    1,239.93/1,859.94 = 374.25/x
  3. Step 3: Cross multiply
    1,239.93x = 1,859.94 × 374.25
  4. Step 4: Simplify right side
    1,239.93x = 696,082.55
  5. Step 5: Solve for x
    x = 696,082.55/1,239.93
  6. Step 6: Final answer
    x = 561.39

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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.