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Finding the Fourth Proportional to 1,282,536.90, 1,769,745.33 and 738,848.70

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Solution

The fourth proportional to 1,282,536.90, 1,769,745.33 and 738,848.70 is: 1,019,521.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282,536.90 : 1,769,745.33 = 738,848.70 : x
  2. Step 2: Convert to fraction form
    1,282,536.90/1,769,745.33 = 738,848.70/x
  3. Step 3: Cross multiply
    1,282,536.90x = 1,769,745.33 × 738,848.70
  4. Step 4: Simplify right side
    1,282,536.90x = 1,307,574,036,401.57
  5. Step 5: Solve for x
    x = 1,307,574,036,401.57/1,282,536.90
  6. Step 6: Final answer
    x = 1,019,521.57

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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.