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Finding the Fourth Proportional to 3,985,666.80, 5,978,500.20 and 3,950,237.40

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Solution

The fourth proportional to 3,985,666.80, 5,978,500.20 and 3,950,237.40 is: 5,925,356.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985,666.80 : 5,978,500.20 = 3,950,237.40 : x
  2. Step 2: Convert to fraction form
    3,985,666.80/5,978,500.20 = 3,950,237.40/x
  3. Step 3: Cross multiply
    3,985,666.80x = 5,978,500.20 × 3,950,237.40
  4. Step 4: Simplify right side
    3,985,666.80x = 23,616,495,085,947.48
  5. Step 5: Solve for x
    x = 23,616,495,085,947.48/3,985,666.80
  6. Step 6: Final answer
    x = 5,925,356.10

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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.