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Finding the Fourth Proportional to 1,621,741.64, 2,238,358.74 and 943,069.64

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Solution

The fourth proportional to 1,621,741.64, 2,238,358.74 and 943,069.64 is: 1,301,642.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621,741.64 : 2,238,358.74 = 943,069.64 : x
  2. Step 2: Convert to fraction form
    1,621,741.64/2,238,358.74 = 943,069.64/x
  3. Step 3: Cross multiply
    1,621,741.64x = 2,238,358.74 × 943,069.64
  4. Step 4: Simplify right side
    1,621,741.64x = 2,110,928,171,122.65
  5. Step 5: Solve for x
    x = 2,110,928,171,122.65/1,621,741.64
  6. Step 6: Final answer
    x = 1,301,642.70

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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.