Home / 1,278,380.49-1,918,303.38-520,081.98

Finding the Fourth Proportional to 1,278,380.49, 1,918,303.38 and 520,081.98

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Solution

The fourth proportional to 1,278,380.49, 1,918,303.38 and 520,081.98 is: 780,421.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,380.49 : 1,918,303.38 = 520,081.98 : x
  2. Step 2: Convert to fraction form
    1,278,380.49/1,918,303.38 = 520,081.98/x
  3. Step 3: Cross multiply
    1,278,380.49x = 1,918,303.38 × 520,081.98
  4. Step 4: Simplify right side
    1,278,380.49x = 997,675,020,111.09
  5. Step 5: Solve for x
    x = 997,675,020,111.09/1,278,380.49
  6. Step 6: Final answer
    x = 780,421.03

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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.