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Finding the Fourth Proportional to 1,312,512.60, 1,968,768.90 and 980,736.60

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Solution

The fourth proportional to 1,312,512.60, 1,968,768.90 and 980,736.60 is: 1,471,104.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,512.60 : 1,968,768.90 = 980,736.60 : x
  2. Step 2: Convert to fraction form
    1,312,512.60/1,968,768.90 = 980,736.60/x
  3. Step 3: Cross multiply
    1,312,512.60x = 1,968,768.90 × 980,736.60
  4. Step 4: Simplify right side
    1,312,512.60x = 1,930,843,717,171.74
  5. Step 5: Solve for x
    x = 1,930,843,717,171.74/1,312,512.60
  6. Step 6: Final answer
    x = 1,471,104.90

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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.