Home / 1,403.90-1,936.63-1,071.75

Finding the Fourth Proportional to 1,403.90, 1,936.63 and 1,071.75

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Solution

The fourth proportional to 1,403.90, 1,936.63 and 1,071.75 is: 1,478.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.90 : 1,936.63 = 1,071.75 : x
  2. Step 2: Convert to fraction form
    1,403.90/1,936.63 = 1,071.75/x
  3. Step 3: Cross multiply
    1,403.90x = 1,936.63 × 1,071.75
  4. Step 4: Simplify right side
    1,403.90x = 2,075,574.88
  5. Step 5: Solve for x
    x = 2,075,574.88/1,403.90
  6. Step 6: Final answer
    x = 1,478.44

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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.