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Finding the Fourth Proportional to 1,943,999.90, 2,915,999.85 and 1,855,426.40

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Solution

The fourth proportional to 1,943,999.90, 2,915,999.85 and 1,855,426.40 is: 2,783,139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,943,999.90 : 2,915,999.85 = 1,855,426.40 : x
  2. Step 2: Convert to fraction form
    1,943,999.90/2,915,999.85 = 1,855,426.40/x
  3. Step 3: Cross multiply
    1,943,999.90x = 2,915,999.85 × 1,855,426.40
  4. Step 4: Simplify right side
    1,943,999.90x = 5,410,423,104,086.04
  5. Step 5: Solve for x
    x = 5,410,423,104,086.04/1,943,999.90
  6. Step 6: Final answer
    x = 2,783,139.60

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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.