Home / 812,215.60-1,120,505.60-489,746.57

Finding the Fourth Proportional to 812,215.60, 1,120,505.60 and 489,746.57

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Solution

The fourth proportional to 812,215.60, 1,120,505.60 and 489,746.57 is: 675,638.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,215.60 : 1,120,505.60 = 489,746.57 : x
  2. Step 2: Convert to fraction form
    812,215.60/1,120,505.60 = 489,746.57/x
  3. Step 3: Cross multiply
    812,215.60x = 1,120,505.60 × 489,746.57
  4. Step 4: Simplify right side
    812,215.60x = 548,763,769,887.63
  5. Step 5: Solve for x
    x = 548,763,769,887.63/812,215.60
  6. Step 6: Final answer
    x = 675,638.06

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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.