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Finding the Fourth Proportional to 1,998,986.10, 2,998,479.15 and 1,361,256.90

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Solution

The fourth proportional to 1,998,986.10, 2,998,479.15 and 1,361,256.90 is: 2,041,885.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998,986.10 : 2,998,479.15 = 1,361,256.90 : x
  2. Step 2: Convert to fraction form
    1,998,986.10/2,998,479.15 = 1,361,256.90/x
  3. Step 3: Cross multiply
    1,998,986.10x = 2,998,479.15 × 1,361,256.90
  4. Step 4: Simplify right side
    1,998,986.10x = 4,081,700,432,443.64
  5. Step 5: Solve for x
    x = 4,081,700,432,443.64/1,998,986.10
  6. Step 6: Final answer
    x = 2,041,885.35

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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.