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Finding the Fourth Proportional to 6,391,353.12, 8,820,019.98 and 3,490,745.28

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Solution

The fourth proportional to 6,391,353.12, 8,820,019.98 and 3,490,745.28 is: 4,817,202.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391,353.12 : 8,820,019.98 = 3,490,745.28 : x
  2. Step 2: Convert to fraction form
    6,391,353.12/8,820,019.98 = 3,490,745.28/x
  3. Step 3: Cross multiply
    6,391,353.12x = 8,820,019.98 × 3,490,745.28
  4. Step 4: Simplify right side
    6,391,353.12x = 30,788,443,114,690.70
  5. Step 5: Solve for x
    x = 30,788,443,114,690.70/6,391,353.12
  6. Step 6: Final answer
    x = 4,817,202.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.