Home / 1,391.55-2,095.45-1,028.89

Finding the Fourth Proportional to 1,391.55, 2,095.45 and 1,028.89

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Solution

The fourth proportional to 1,391.55, 2,095.45 and 1,028.89 is: 1,549.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.55 : 2,095.45 = 1,028.89 : x
  2. Step 2: Convert to fraction form
    1,391.55/2,095.45 = 1,028.89/x
  3. Step 3: Cross multiply
    1,391.55x = 2,095.45 × 1,028.89
  4. Step 4: Simplify right side
    1,391.55x = 2,155,987.55
  5. Step 5: Solve for x
    x = 2,155,987.55/1,391.55
  6. Step 6: Final answer
    x = 1,549.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.