Home / 811,975.80-1,217,963.70-768,430.20

Finding the Fourth Proportional to 811,975.80, 1,217,963.70 and 768,430.20

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Solution

The fourth proportional to 811,975.80, 1,217,963.70 and 768,430.20 is: 1,152,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,975.80 : 1,217,963.70 = 768,430.20 : x
  2. Step 2: Convert to fraction form
    811,975.80/1,217,963.70 = 768,430.20/x
  3. Step 3: Cross multiply
    811,975.80x = 1,217,963.70 × 768,430.20
  4. Step 4: Simplify right side
    811,975.80x = 935,920,089,583.74
  5. Step 5: Solve for x
    x = 935,920,089,583.74/811,975.80
  6. Step 6: Final answer
    x = 1,152,645.30

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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.