Home / 1,686.42-2,326.78-1,126.51

Finding the Fourth Proportional to 1,686.42, 2,326.78 and 1,126.51

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Solution

The fourth proportional to 1,686.42, 2,326.78 and 1,126.51 is: 1,554.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.42 : 2,326.78 = 1,126.51 : x
  2. Step 2: Convert to fraction form
    1,686.42/2,326.78 = 1,126.51/x
  3. Step 3: Cross multiply
    1,686.42x = 2,326.78 × 1,126.51
  4. Step 4: Simplify right side
    1,686.42x = 2,621,130.19
  5. Step 5: Solve for x
    x = 2,621,130.19/1,686.42
  6. Step 6: Final answer
    x = 1,554.26

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1.5x scale

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.