Home / 1,563.42-2,155.47-1,296.90

Finding the Fourth Proportional to 1,563.42, 2,155.47 and 1,296.90

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Solution

The fourth proportional to 1,563.42, 2,155.47 and 1,296.90 is: 1,788.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.42 : 2,155.47 = 1,296.90 : x
  2. Step 2: Convert to fraction form
    1,563.42/2,155.47 = 1,296.90/x
  3. Step 3: Cross multiply
    1,563.42x = 2,155.47 × 1,296.90
  4. Step 4: Simplify right side
    1,563.42x = 2,795,429.04
  5. Step 5: Solve for x
    x = 2,795,429.04/1,563.42
  6. Step 6: Final answer
    x = 1,788.02

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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.