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Finding the Fourth Proportional to 4,612,819.77, 6,919,890 and 1,418,214.18

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Solution

The fourth proportional to 4,612,819.77, 6,919,890 and 1,418,214.18 is: 2,127,524.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,612,819.77 : 6,919,890 = 1,418,214.18 : x
  2. Step 2: Convert to fraction form
    4,612,819.77/6,919,890 = 1,418,214.18/x
  3. Step 3: Cross multiply
    4,612,819.77x = 6,919,890 × 1,418,214.18
  4. Step 4: Simplify right side
    4,612,819.77x = 9,813,886,122,040.20
  5. Step 5: Solve for x
    x = 9,813,886,122,040.20/4,612,819.77
  6. Step 6: Final answer
    x = 2,127,524.29

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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.