Home / 1,392.60-2,087.70-1,246.80

Finding the Fourth Proportional to 1,392.60, 2,087.70 and 1,246.80

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Solution

The fourth proportional to 1,392.60, 2,087.70 and 1,246.80 is: 1,869.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.60 : 2,087.70 = 1,246.80 : x
  2. Step 2: Convert to fraction form
    1,392.60/2,087.70 = 1,246.80/x
  3. Step 3: Cross multiply
    1,392.60x = 2,087.70 × 1,246.80
  4. Step 4: Simplify right side
    1,392.60x = 2,602,944.36
  5. Step 5: Solve for x
    x = 2,602,944.36/1,392.60
  6. Step 6: Final answer
    x = 1,869.13

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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.