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Finding the Fourth Proportional to 1,709.40, 2,564.15 and 539.41

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Solution

The fourth proportional to 1,709.40, 2,564.15 and 539.41 is: 809.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.40 : 2,564.15 = 539.41 : x
  2. Step 2: Convert to fraction form
    1,709.40/2,564.15 = 539.41/x
  3. Step 3: Cross multiply
    1,709.40x = 2,564.15 × 539.41
  4. Step 4: Simplify right side
    1,709.40x = 1,383,132.71
  5. Step 5: Solve for x
    x = 1,383,132.71/1,709.40
  6. Step 6: Final answer
    x = 809.13

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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.