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Finding the Fourth Proportional to 4,938,956.20, 7,408,978.62 and 1,572,380.20

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Solution

The fourth proportional to 4,938,956.20, 7,408,978.62 and 1,572,380.20 is: 2,358,743.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,938,956.20 : 7,408,978.62 = 1,572,380.20 : x
  2. Step 2: Convert to fraction form
    4,938,956.20/7,408,978.62 = 1,572,380.20/x
  3. Step 3: Cross multiply
    4,938,956.20x = 7,408,978.62 × 1,572,380.20
  4. Step 4: Simplify right side
    4,938,956.20x = 11,649,731,284,311.32
  5. Step 5: Solve for x
    x = 11,649,731,284,311.32/4,938,956.20
  6. Step 6: Final answer
    x = 2,358,743.59

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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.