Home / 1,351,481.60-1,865,020.80-778,520

Finding the Fourth Proportional to 1,351,481.60, 1,865,020.80 and 778,520

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Solution

The fourth proportional to 1,351,481.60, 1,865,020.80 and 778,520 is: 1,074,343.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351,481.60 : 1,865,020.80 = 778,520 : x
  2. Step 2: Convert to fraction form
    1,351,481.60/1,865,020.80 = 778,520/x
  3. Step 3: Cross multiply
    1,351,481.60x = 1,865,020.80 × 778,520
  4. Step 4: Simplify right side
    1,351,481.60x = 1,451,955,993,216
  5. Step 5: Solve for x
    x = 1,451,955,993,216/1,351,481.60
  6. Step 6: Final answer
    x = 1,074,343.89

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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.