Home / 1,378,778.50-1,902,714.24-775,166.50

Finding the Fourth Proportional to 1,378,778.50, 1,902,714.24 and 775,166.50

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Solution

The fourth proportional to 1,378,778.50, 1,902,714.24 and 775,166.50 is: 1,069,729.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378,778.50 : 1,902,714.24 = 775,166.50 : x
  2. Step 2: Convert to fraction form
    1,378,778.50/1,902,714.24 = 775,166.50/x
  3. Step 3: Cross multiply
    1,378,778.50x = 1,902,714.24 × 775,166.50
  4. Step 4: Simplify right side
    1,378,778.50x = 1,474,920,337,920.96
  5. Step 5: Solve for x
    x = 1,474,920,337,920.96/1,378,778.50
  6. Step 6: Final answer
    x = 1,069,729.72

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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.