Home / 715,869.44-987,848.96-393,571.20

Finding the Fourth Proportional to 715,869.44, 987,848.96 and 393,571.20

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Solution

The fourth proportional to 715,869.44, 987,848.96 and 393,571.20 is: 543,100.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,869.44 : 987,848.96 = 393,571.20 : x
  2. Step 2: Convert to fraction form
    715,869.44/987,848.96 = 393,571.20/x
  3. Step 3: Cross multiply
    715,869.44x = 987,848.96 × 393,571.20
  4. Step 4: Simplify right side
    715,869.44x = 388,788,900,605.95
  5. Step 5: Solve for x
    x = 388,788,900,605.95/715,869.44
  6. Step 6: Final answer
    x = 543,100.29

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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.