Home / 1,541.37-2,126.57-912.11

Finding the Fourth Proportional to 1,541.37, 2,126.57 and 912.11

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Solution

The fourth proportional to 1,541.37, 2,126.57 and 912.11 is: 1,258.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.37 : 2,126.57 = 912.11 : x
  2. Step 2: Convert to fraction form
    1,541.37/2,126.57 = 912.11/x
  3. Step 3: Cross multiply
    1,541.37x = 2,126.57 × 912.11
  4. Step 4: Simplify right side
    1,541.37x = 1,939,657.41
  5. Step 5: Solve for x
    x = 1,939,657.41/1,541.37
  6. Step 6: Final answer
    x = 1,258.40

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Half scale
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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.