Home / 1,412.19-1,931.58-1,389.51

Finding the Fourth Proportional to 1,412.19, 1,931.58 and 1,389.51

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Solution

The fourth proportional to 1,412.19, 1,931.58 and 1,389.51 is: 1,900.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.19 : 1,931.58 = 1,389.51 : x
  2. Step 2: Convert to fraction form
    1,412.19/1,931.58 = 1,389.51/x
  3. Step 3: Cross multiply
    1,412.19x = 1,931.58 × 1,389.51
  4. Step 4: Simplify right side
    1,412.19x = 2,683,949.73
  5. Step 5: Solve for x
    x = 2,683,949.73/1,412.19
  6. Step 6: Final answer
    x = 1,900.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.