Home / 513,828.80-770,743.20-139,851.20

Finding the Fourth Proportional to 513,828.80, 770,743.20 and 139,851.20

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Solution

The fourth proportional to 513,828.80, 770,743.20 and 139,851.20 is: 209,776.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,828.80 : 770,743.20 = 139,851.20 : x
  2. Step 2: Convert to fraction form
    513,828.80/770,743.20 = 139,851.20/x
  3. Step 3: Cross multiply
    513,828.80x = 770,743.20 × 139,851.20
  4. Step 4: Simplify right side
    513,828.80x = 107,789,361,411.84
  5. Step 5: Solve for x
    x = 107,789,361,411.84/513,828.80
  6. Step 6: Final answer
    x = 209,776.80

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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.