Home / 2,087.78-3,130.82-1,047.40

Finding the Fourth Proportional to 2,087.78, 3,130.82 and 1,047.40

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Solution

The fourth proportional to 2,087.78, 3,130.82 and 1,047.40 is: 1,570.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.78 : 3,130.82 = 1,047.40 : x
  2. Step 2: Convert to fraction form
    2,087.78/3,130.82 = 1,047.40/x
  3. Step 3: Cross multiply
    2,087.78x = 3,130.82 × 1,047.40
  4. Step 4: Simplify right side
    2,087.78x = 3,279,220.87
  5. Step 5: Solve for x
    x = 3,279,220.87/2,087.78
  6. Step 6: Final answer
    x = 1,570.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.