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Finding the Fourth Proportional to 1,406.03, 1,939.75 and 874.53

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Solution

The fourth proportional to 1,406.03, 1,939.75 and 874.53 is: 1,206.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.03 : 1,939.75 = 874.53 : x
  2. Step 2: Convert to fraction form
    1,406.03/1,939.75 = 874.53/x
  3. Step 3: Cross multiply
    1,406.03x = 1,939.75 × 874.53
  4. Step 4: Simplify right side
    1,406.03x = 1,696,367.38
  5. Step 5: Solve for x
    x = 1,696,367.38/1,406.03
  6. Step 6: Final answer
    x = 1,206.50

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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.