Home / 1,687.40-2,325.95-1,267.15

Finding the Fourth Proportional to 1,687.40, 2,325.95 and 1,267.15

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Solution

The fourth proportional to 1,687.40, 2,325.95 and 1,267.15 is: 1,746.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.40 : 2,325.95 = 1,267.15 : x
  2. Step 2: Convert to fraction form
    1,687.40/2,325.95 = 1,267.15/x
  3. Step 3: Cross multiply
    1,687.40x = 2,325.95 × 1,267.15
  4. Step 4: Simplify right side
    1,687.40x = 2,947,327.54
  5. Step 5: Solve for x
    x = 2,947,327.54/1,687.40
  6. Step 6: Final answer
    x = 1,746.67

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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.