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Finding the Fourth Proportional to 5,315,846.40, 7,968,326.40 and 2,616,019.20

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Solution

The fourth proportional to 5,315,846.40, 7,968,326.40 and 2,616,019.20 is: 3,921,350.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315,846.40 : 7,968,326.40 = 2,616,019.20 : x
  2. Step 2: Convert to fraction form
    5,315,846.40/7,968,326.40 = 2,616,019.20/x
  3. Step 3: Cross multiply
    5,315,846.40x = 7,968,326.40 × 2,616,019.20
  4. Step 4: Simplify right side
    5,315,846.40x = 20,845,294,854,266.88
  5. Step 5: Solve for x
    x = 20,845,294,854,266.88/5,315,846.40
  6. Step 6: Final answer
    x = 3,921,350.11

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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.