Home / 1,391.64-2,088.48-1,121.00

Finding the Fourth Proportional to 1,391.64, 2,088.48 and 1,121.00

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Solution

The fourth proportional to 1,391.64, 2,088.48 and 1,121.00 is: 1,682.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.64 : 2,088.48 = 1,121.00 : x
  2. Step 2: Convert to fraction form
    1,391.64/2,088.48 = 1,121.00/x
  3. Step 3: Cross multiply
    1,391.64x = 2,088.48 × 1,121.00
  4. Step 4: Simplify right side
    1,391.64x = 2,341,170.38
  5. Step 5: Solve for x
    x = 2,341,170.38/1,391.64
  6. Step 6: Final answer
    x = 1,682.31

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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.