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Finding the Fourth Proportional to 2,655,774.20, 3,978,909.30 and 1,615,230.20

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Solution

The fourth proportional to 2,655,774.20, 3,978,909.30 and 1,615,230.20 is: 2,419,955.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655,774.20 : 3,978,909.30 = 1,615,230.20 : x
  2. Step 2: Convert to fraction form
    2,655,774.20/3,978,909.30 = 1,615,230.20/x
  3. Step 3: Cross multiply
    2,655,774.20x = 3,978,909.30 × 1,615,230.20
  4. Step 4: Simplify right side
    2,655,774.20x = 6,426,854,464,420.86
  5. Step 5: Solve for x
    x = 6,426,854,464,420.86/2,655,774.20
  6. Step 6: Final answer
    x = 2,419,955.15

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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.