Home / 1,390.18-2,073.49-1,172.25

Finding the Fourth Proportional to 1,390.18, 2,073.49 and 1,172.25

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Solution

The fourth proportional to 1,390.18, 2,073.49 and 1,172.25 is: 1,748.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.18 : 2,073.49 = 1,172.25 : x
  2. Step 2: Convert to fraction form
    1,390.18/2,073.49 = 1,172.25/x
  3. Step 3: Cross multiply
    1,390.18x = 2,073.49 × 1,172.25
  4. Step 4: Simplify right side
    1,390.18x = 2,430,648.65
  5. Step 5: Solve for x
    x = 2,430,648.65/1,390.18
  6. Step 6: Final answer
    x = 1,748.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.