Home / 1,401.17-2,102.21-915.17

Finding the Fourth Proportional to 1,401.17, 2,102.21 and 915.17

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Solution

The fourth proportional to 1,401.17, 2,102.21 and 915.17 is: 1,373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.17 : 2,102.21 = 915.17 : x
  2. Step 2: Convert to fraction form
    1,401.17/2,102.21 = 915.17/x
  3. Step 3: Cross multiply
    1,401.17x = 2,102.21 × 915.17
  4. Step 4: Simplify right side
    1,401.17x = 1,923,879.53
  5. Step 5: Solve for x
    x = 1,923,879.53/1,401.17
  6. Step 6: Final answer
    x = 1,373.05

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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.