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Finding the Fourth Proportional to 1,919,217.03, 2,648,521.05 and 1,230,886.76

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Solution

The fourth proportional to 1,919,217.03, 2,648,521.05 and 1,230,886.76 is: 1,698,624.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919,217.03 : 2,648,521.05 = 1,230,886.76 : x
  2. Step 2: Convert to fraction form
    1,919,217.03/2,648,521.05 = 1,230,886.76/x
  3. Step 3: Cross multiply
    1,919,217.03x = 2,648,521.05 × 1,230,886.76
  4. Step 4: Simplify right side
    1,919,217.03x = 3,260,029,476,167.87
  5. Step 5: Solve for x
    x = 3,260,029,476,167.87/1,919,217.03
  6. Step 6: Final answer
    x = 1,698,624.72

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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.