Home / 1,770.40-2,653.20-1,256.80

Finding the Fourth Proportional to 1,770.40, 2,653.20 and 1,256.80

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Solution

The fourth proportional to 1,770.40, 2,653.20 and 1,256.80 is: 1,883.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,770.40 : 2,653.20 = 1,256.80 : x
  2. Step 2: Convert to fraction form
    1,770.40/2,653.20 = 1,256.80/x
  3. Step 3: Cross multiply
    1,770.40x = 2,653.20 × 1,256.80
  4. Step 4: Simplify right side
    1,770.40x = 3,334,541.76
  5. Step 5: Solve for x
    x = 3,334,541.76/1,770.40
  6. Step 6: Final answer
    x = 1,883.50

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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.