Home / 1,541.16-2,126.61-911.70

Finding the Fourth Proportional to 1,541.16, 2,126.61 and 911.70

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Solution

The fourth proportional to 1,541.16, 2,126.61 and 911.70 is: 1,258.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.16 : 2,126.61 = 911.70 : x
  2. Step 2: Convert to fraction form
    1,541.16/2,126.61 = 911.70/x
  3. Step 3: Cross multiply
    1,541.16x = 2,126.61 × 911.70
  4. Step 4: Simplify right side
    1,541.16x = 1,938,830.34
  5. Step 5: Solve for x
    x = 1,938,830.34/1,541.16
  6. Step 6: Final answer
    x = 1,258.03

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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.