Home / 1,911-2,637.18-1,125.53

Finding the Fourth Proportional to 1,911, 2,637.18 and 1,125.53

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Solution

The fourth proportional to 1,911, 2,637.18 and 1,125.53 is: 1,553.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911 : 2,637.18 = 1,125.53 : x
  2. Step 2: Convert to fraction form
    1,911/2,637.18 = 1,125.53/x
  3. Step 3: Cross multiply
    1,911x = 2,637.18 × 1,125.53
  4. Step 4: Simplify right side
    1,911x = 2,968,225.21
  5. Step 5: Solve for x
    x = 2,968,225.21/1,911
  6. Step 6: Final answer
    x = 1,553.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.