Home / 1,431.11-2,127.36-1,389.06

Finding the Fourth Proportional to 1,431.11, 2,127.36 and 1,389.06

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Solution

The fourth proportional to 1,431.11, 2,127.36 and 1,389.06 is: 2,064.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.11 : 2,127.36 = 1,389.06 : x
  2. Step 2: Convert to fraction form
    1,431.11/2,127.36 = 1,389.06/x
  3. Step 3: Cross multiply
    1,431.11x = 2,127.36 × 1,389.06
  4. Step 4: Simplify right side
    1,431.11x = 2,955,038.66
  5. Step 5: Solve for x
    x = 2,955,038.66/1,431.11
  6. Step 6: Final answer
    x = 2,064.87

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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.