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Finding the Fourth Proportional to 6,985,605.20, 10,478,407.80 and 6,654,930.80

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Solution

The fourth proportional to 6,985,605.20, 10,478,407.80 and 6,654,930.80 is: 9,982,396.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985,605.20 : 10,478,407.80 = 6,654,930.80 : x
  2. Step 2: Convert to fraction form
    6,985,605.20/10,478,407.80 = 6,654,930.80/x
  3. Step 3: Cross multiply
    6,985,605.20x = 10,478,407.80 × 6,654,930.80
  4. Step 4: Simplify right side
    6,985,605.20x = 69,733,078,803,180.24
  5. Step 5: Solve for x
    x = 69,733,078,803,180.24/6,985,605.20
  6. Step 6: Final answer
    x = 9,982,396.20

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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.