Home / 1,431.16-1,974.84-841.48

Finding the Fourth Proportional to 1,431.16, 1,974.84 and 841.48

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Solution

The fourth proportional to 1,431.16, 1,974.84 and 841.48 is: 1,161.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.16 : 1,974.84 = 841.48 : x
  2. Step 2: Convert to fraction form
    1,431.16/1,974.84 = 841.48/x
  3. Step 3: Cross multiply
    1,431.16x = 1,974.84 × 841.48
  4. Step 4: Simplify right side
    1,431.16x = 1,661,788.36
  5. Step 5: Solve for x
    x = 1,661,788.36/1,431.16
  6. Step 6: Final answer
    x = 1,161.15

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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.