Home / 1,853.60-2,780.40-1,686.20

Finding the Fourth Proportional to 1,853.60, 2,780.40 and 1,686.20

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Solution

The fourth proportional to 1,853.60, 2,780.40 and 1,686.20 is: 2,529.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.60 : 2,780.40 = 1,686.20 : x
  2. Step 2: Convert to fraction form
    1,853.60/2,780.40 = 1,686.20/x
  3. Step 3: Cross multiply
    1,853.60x = 2,780.40 × 1,686.20
  4. Step 4: Simplify right side
    1,853.60x = 4,688,310.48
  5. Step 5: Solve for x
    x = 4,688,310.48/1,853.60
  6. Step 6: Final answer
    x = 2,529.30

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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.