Home / 1,911.51-2,636.85-1,203.15

Finding the Fourth Proportional to 1,911.51, 2,636.85 and 1,203.15

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Solution

The fourth proportional to 1,911.51, 2,636.85 and 1,203.15 is: 1,659.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.51 : 2,636.85 = 1,203.15 : x
  2. Step 2: Convert to fraction form
    1,911.51/2,636.85 = 1,203.15/x
  3. Step 3: Cross multiply
    1,911.51x = 2,636.85 × 1,203.15
  4. Step 4: Simplify right side
    1,911.51x = 3,172,526.08
  5. Step 5: Solve for x
    x = 3,172,526.08/1,911.51
  6. Step 6: Final answer
    x = 1,659.70

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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.