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Finding the Fourth Proportional to 3,478,475.20, 5,217,712.80 and 3,478,475.20

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Solution

The fourth proportional to 3,478,475.20, 5,217,712.80 and 3,478,475.20 is: 5,217,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478,475.20 : 5,217,712.80 = 3,478,475.20 : x
  2. Step 2: Convert to fraction form
    3,478,475.20/5,217,712.80 = 3,478,475.20/x
  3. Step 3: Cross multiply
    3,478,475.20x = 5,217,712.80 × 3,478,475.20
  4. Step 4: Simplify right side
    3,478,475.20x = 18,149,684,575,522.56
  5. Step 5: Solve for x
    x = 18,149,684,575,522.56/3,478,475.20
  6. Step 6: Final answer
    x = 5,217,712.80

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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.