Home / 1,401.45-2,092.80-1,320.45

Finding the Fourth Proportional to 1,401.45, 2,092.80 and 1,320.45

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Solution

The fourth proportional to 1,401.45, 2,092.80 and 1,320.45 is: 1,971.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.45 : 2,092.80 = 1,320.45 : x
  2. Step 2: Convert to fraction form
    1,401.45/2,092.80 = 1,320.45/x
  3. Step 3: Cross multiply
    1,401.45x = 2,092.80 × 1,320.45
  4. Step 4: Simplify right side
    1,401.45x = 2,763,437.76
  5. Step 5: Solve for x
    x = 2,763,437.76/1,401.45
  6. Step 6: Final answer
    x = 1,971.84

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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.