Home / 1,078,680.40-1,619,351.80-679,320.40

Finding the Fourth Proportional to 1,078,680.40, 1,619,351.80 and 679,320.40

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Solution

The fourth proportional to 1,078,680.40, 1,619,351.80 and 679,320.40 is: 1,019,818.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,680.40 : 1,619,351.80 = 679,320.40 : x
  2. Step 2: Convert to fraction form
    1,078,680.40/1,619,351.80 = 679,320.40/x
  3. Step 3: Cross multiply
    1,078,680.40x = 1,619,351.80 × 679,320.40
  4. Step 4: Simplify right side
    1,078,680.40x = 1,100,058,712,516.72
  5. Step 5: Solve for x
    x = 1,100,058,712,516.72/1,078,680.40
  6. Step 6: Final answer
    x = 1,019,818.95

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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.