Home / 1,395.09-2,083.80-1,315.12

Finding the Fourth Proportional to 1,395.09, 2,083.80 and 1,315.12

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Solution

The fourth proportional to 1,395.09, 2,083.80 and 1,315.12 is: 1,964.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.09 : 2,083.80 = 1,315.12 : x
  2. Step 2: Convert to fraction form
    1,395.09/2,083.80 = 1,315.12/x
  3. Step 3: Cross multiply
    1,395.09x = 2,083.80 × 1,315.12
  4. Step 4: Simplify right side
    1,395.09x = 2,740,440.48
  5. Step 5: Solve for x
    x = 2,740,440.48/1,395.09
  6. Step 6: Final answer
    x = 1,964.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.