Home / 812,216.51-1,120,506.94-489,747.46

Finding the Fourth Proportional to 812,216.51, 1,120,506.94 and 489,747.46

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Solution

The fourth proportional to 812,216.51, 1,120,506.94 and 489,747.46 is: 675,639.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,216.51 : 1,120,506.94 = 489,747.46 : x
  2. Step 2: Convert to fraction form
    812,216.51/1,120,506.94 = 489,747.46/x
  3. Step 3: Cross multiply
    812,216.51x = 1,120,506.94 × 489,747.46
  4. Step 4: Simplify right side
    812,216.51x = 548,765,423,751.74
  5. Step 5: Solve for x
    x = 548,765,423,751.74/812,216.51
  6. Step 6: Final answer
    x = 675,639.34

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1.5x scale

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.