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Finding the Fourth Proportional to 1,300,986.80, 1,956,145.80 and 1,095,700.40

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Solution

The fourth proportional to 1,300,986.80, 1,956,145.80 and 1,095,700.40 is: 1,647,480.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,300,986.80 : 1,956,145.80 = 1,095,700.40 : x
  2. Step 2: Convert to fraction form
    1,300,986.80/1,956,145.80 = 1,095,700.40/x
  3. Step 3: Cross multiply
    1,300,986.80x = 1,956,145.80 × 1,095,700.40
  4. Step 4: Simplify right side
    1,300,986.80x = 2,143,349,735,518.32
  5. Step 5: Solve for x
    x = 2,143,349,735,518.32/1,300,986.80
  6. Step 6: Final answer
    x = 1,647,480.00

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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.