Home / 1,401.57-2,102.36-1,278.86

Finding the Fourth Proportional to 1,401.57, 2,102.36 and 1,278.86

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Solution

The fourth proportional to 1,401.57, 2,102.36 and 1,278.86 is: 1,918.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.57 : 2,102.36 = 1,278.86 : x
  2. Step 2: Convert to fraction form
    1,401.57/2,102.36 = 1,278.86/x
  3. Step 3: Cross multiply
    1,401.57x = 2,102.36 × 1,278.86
  4. Step 4: Simplify right side
    1,401.57x = 2,688,607.20
  5. Step 5: Solve for x
    x = 2,688,607.20/1,401.57
  6. Step 6: Final answer
    x = 1,918.28

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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.