Home / 1,278,370.74-1,918,288.76-520,072.23

Finding the Fourth Proportional to 1,278,370.74, 1,918,288.76 and 520,072.23

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Solution

The fourth proportional to 1,278,370.74, 1,918,288.76 and 520,072.23 is: 780,406.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,370.74 : 1,918,288.76 = 520,072.23 : x
  2. Step 2: Convert to fraction form
    1,278,370.74/1,918,288.76 = 520,072.23/x
  3. Step 3: Cross multiply
    1,278,370.74x = 1,918,288.76 × 520,072.23
  4. Step 4: Simplify right side
    1,278,370.74x = 997,648,710,596.77
  5. Step 5: Solve for x
    x = 997,648,710,596.77/1,278,370.74
  6. Step 6: Final answer
    x = 780,406.40

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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.