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Finding the Fourth Proportional to 1,992,981.90, 2,984,978.26 and 925,778.15

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Solution

The fourth proportional to 1,992,981.90, 2,984,978.26 and 925,778.15 is: 1,386,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,981.90 : 2,984,978.26 = 925,778.15 : x
  2. Step 2: Convert to fraction form
    1,992,981.90/2,984,978.26 = 925,778.15/x
  3. Step 3: Cross multiply
    1,992,981.90x = 2,984,978.26 × 925,778.15
  4. Step 4: Simplify right side
    1,992,981.90x = 2,763,427,651,333.02
  5. Step 5: Solve for x
    x = 2,763,427,651,333.02/1,992,981.90
  6. Step 6: Final answer
    x = 1,386,579.40

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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.