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Finding the Fourth Proportional to 7,381,978.80, 11,074,523.40 and 3,119,953.20

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Solution

The fourth proportional to 7,381,978.80, 11,074,523.40 and 3,119,953.20 is: 4,680,587.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,381,978.80 : 11,074,523.40 = 3,119,953.20 : x
  2. Step 2: Convert to fraction form
    7,381,978.80/11,074,523.40 = 3,119,953.20/x
  3. Step 3: Cross multiply
    7,381,978.80x = 11,074,523.40 × 3,119,953.20
  4. Step 4: Simplify right side
    7,381,978.80x = 34,551,994,720,304.88
  5. Step 5: Solve for x
    x = 34,551,994,720,304.88/7,381,978.80
  6. Step 6: Final answer
    x = 4,680,587.10

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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.