Home / 771,631.72-1,065,131.27-628,142.65

Finding the Fourth Proportional to 771,631.72, 1,065,131.27 and 628,142.65

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Solution

The fourth proportional to 771,631.72, 1,065,131.27 and 628,142.65 is: 867,064.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,631.72 : 1,065,131.27 = 628,142.65 : x
  2. Step 2: Convert to fraction form
    771,631.72/1,065,131.27 = 628,142.65/x
  3. Step 3: Cross multiply
    771,631.72x = 1,065,131.27 × 628,142.65
  4. Step 4: Simplify right side
    771,631.72x = 669,054,375,087.66
  5. Step 5: Solve for x
    x = 669,054,375,087.66/771,631.72
  6. Step 6: Final answer
    x = 867,064.38

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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.