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Finding the Fourth Proportional to 1,992,988.40, 2,984,988.02 and 925,784.65

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Solution

The fourth proportional to 1,992,988.40, 2,984,988.02 and 925,784.65 is: 1,386,589.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,988.40 : 2,984,988.02 = 925,784.65 : x
  2. Step 2: Convert to fraction form
    1,992,988.40/2,984,988.02 = 925,784.65/x
  3. Step 3: Cross multiply
    1,992,988.40x = 2,984,988.02 × 925,784.65
  4. Step 4: Simplify right side
    1,992,988.40x = 2,763,456,077,258.50
  5. Step 5: Solve for x
    x = 2,763,456,077,258.50/1,992,988.40
  6. Step 6: Final answer
    x = 1,386,589.14

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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.