Home / 589.12-811.70-439.11

Finding the Fourth Proportional to 589.12, 811.70 and 439.11

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Solution

The fourth proportional to 589.12, 811.70 and 439.11 is: 605.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.12 : 811.70 = 439.11 : x
  2. Step 2: Convert to fraction form
    589.12/811.70 = 439.11/x
  3. Step 3: Cross multiply
    589.12x = 811.70 × 439.11
  4. Step 4: Simplify right side
    589.12x = 356,422.66
  5. Step 5: Solve for x
    x = 356,422.66/589.12
  6. Step 6: Final answer
    x = 605.01

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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.