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Finding the Fourth Proportional to 3,985,666.20, 5,978,499.30 and 1,326,274.20

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Solution

The fourth proportional to 3,985,666.20, 5,978,499.30 and 1,326,274.20 is: 1,989,411.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985,666.20 : 5,978,499.30 = 1,326,274.20 : x
  2. Step 2: Convert to fraction form
    3,985,666.20/5,978,499.30 = 1,326,274.20/x
  3. Step 3: Cross multiply
    3,985,666.20x = 5,978,499.30 × 1,326,274.20
  4. Step 4: Simplify right side
    3,985,666.20x = 7,929,129,376,308.06
  5. Step 5: Solve for x
    x = 7,929,129,376,308.06/3,985,666.20
  6. Step 6: Final answer
    x = 1,989,411.30

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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.