Home / 1,263.60-1,879.20-1,166.40

Finding the Fourth Proportional to 1,263.60, 1,879.20 and 1,166.40

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Solution

The fourth proportional to 1,263.60, 1,879.20 and 1,166.40 is: 1,734.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.60 : 1,879.20 = 1,166.40 : x
  2. Step 2: Convert to fraction form
    1,263.60/1,879.20 = 1,166.40/x
  3. Step 3: Cross multiply
    1,263.60x = 1,879.20 × 1,166.40
  4. Step 4: Simplify right side
    1,263.60x = 2,191,898.88
  5. Step 5: Solve for x
    x = 2,191,898.88/1,263.60
  6. Step 6: Final answer
    x = 1,734.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.