Home / 1,401.12-2,100.64-621.04

Finding the Fourth Proportional to 1,401.12, 2,100.64 and 621.04

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Solution

The fourth proportional to 1,401.12, 2,100.64 and 621.04 is: 931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.12 : 2,100.64 = 621.04 : x
  2. Step 2: Convert to fraction form
    1,401.12/2,100.64 = 621.04/x
  3. Step 3: Cross multiply
    1,401.12x = 2,100.64 × 621.04
  4. Step 4: Simplify right side
    1,401.12x = 1,304,581.47
  5. Step 5: Solve for x
    x = 1,304,581.47/1,401.12
  6. Step 6: Final answer
    x = 931.10

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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.