Home / 1,393.26-2,075.31-1,330.08

Finding the Fourth Proportional to 1,393.26, 2,075.31 and 1,330.08

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Solution

The fourth proportional to 1,393.26, 2,075.31 and 1,330.08 is: 1,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.26 : 2,075.31 = 1,330.08 : x
  2. Step 2: Convert to fraction form
    1,393.26/2,075.31 = 1,330.08/x
  3. Step 3: Cross multiply
    1,393.26x = 2,075.31 × 1,330.08
  4. Step 4: Simplify right side
    1,393.26x = 2,760,328.32
  5. Step 5: Solve for x
    x = 2,760,328.32/1,393.26
  6. Step 6: Final answer
    x = 1,981.20

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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.