Home / 780,078.60-1,170,506.70-443,377.80

Finding the Fourth Proportional to 780,078.60, 1,170,506.70 and 443,377.80

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Solution

The fourth proportional to 780,078.60, 1,170,506.70 and 443,377.80 is: 665,287.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,078.60 : 1,170,506.70 = 443,377.80 : x
  2. Step 2: Convert to fraction form
    780,078.60/1,170,506.70 = 443,377.80/x
  3. Step 3: Cross multiply
    780,078.60x = 1,170,506.70 × 443,377.80
  4. Step 4: Simplify right side
    780,078.60x = 518,976,685,531.26
  5. Step 5: Solve for x
    x = 518,976,685,531.26/780,078.60
  6. Step 6: Final answer
    x = 665,287.68

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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.