Home / 812,215.76-1,120,505.91-489,746.71

Finding the Fourth Proportional to 812,215.76, 1,120,505.91 and 489,746.71

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Solution

The fourth proportional to 812,215.76, 1,120,505.91 and 489,746.71 is: 675,638.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,215.76 : 1,120,505.91 = 489,746.71 : x
  2. Step 2: Convert to fraction form
    812,215.76/1,120,505.91 = 489,746.71/x
  3. Step 3: Cross multiply
    812,215.76x = 1,120,505.91 × 489,746.71
  4. Step 4: Simplify right side
    812,215.76x = 548,764,076,219.29
  5. Step 5: Solve for x
    x = 548,764,076,219.29/812,215.76
  6. Step 6: Final answer
    x = 675,638.31

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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.