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Finding the Fourth Proportional to 1,990,894.40, 2,986,352.40 and 494,986.40

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Solution

The fourth proportional to 1,990,894.40, 2,986,352.40 and 494,986.40 is: 742,482.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,894.40 : 2,986,352.40 = 494,986.40 : x
  2. Step 2: Convert to fraction form
    1,990,894.40/2,986,352.40 = 494,986.40/x
  3. Step 3: Cross multiply
    1,990,894.40x = 2,986,352.40 × 494,986.40
  4. Step 4: Simplify right side
    1,990,894.40x = 1,478,203,823,607.36
  5. Step 5: Solve for x
    x = 1,478,203,823,607.36/1,990,894.40
  6. Step 6: Final answer
    x = 742,482.29

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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.