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Finding the Fourth Proportional to 978,536.80, 1,467,805.20 and 641,738.80

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Solution

The fourth proportional to 978,536.80, 1,467,805.20 and 641,738.80 is: 962,608.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,536.80 : 1,467,805.20 = 641,738.80 : x
  2. Step 2: Convert to fraction form
    978,536.80/1,467,805.20 = 641,738.80/x
  3. Step 3: Cross multiply
    978,536.80x = 1,467,805.20 × 641,738.80
  4. Step 4: Simplify right side
    978,536.80x = 941,947,547,681.76
  5. Step 5: Solve for x
    x = 941,947,547,681.76/978,536.80
  6. Step 6: Final answer
    x = 962,608.20

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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.