Home / 1,401.47-2,102.53-785.60

Finding the Fourth Proportional to 1,401.47, 2,102.53 and 785.60

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Solution

The fourth proportional to 1,401.47, 2,102.53 and 785.60 is: 1,178.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.47 : 2,102.53 = 785.60 : x
  2. Step 2: Convert to fraction form
    1,401.47/2,102.53 = 785.60/x
  3. Step 3: Cross multiply
    1,401.47x = 2,102.53 × 785.60
  4. Step 4: Simplify right side
    1,401.47x = 1,651,738.54
  5. Step 5: Solve for x
    x = 1,651,738.54/1,401.47
  6. Step 6: Final answer
    x = 1,178.58

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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.