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Finding the Fourth Proportional to 2,109.79, 3,164.67 and 570.79

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Solution

The fourth proportional to 2,109.79, 3,164.67 and 570.79 is: 856.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.79 : 3,164.67 = 570.79 : x
  2. Step 2: Convert to fraction form
    2,109.79/3,164.67 = 570.79/x
  3. Step 3: Cross multiply
    2,109.79x = 3,164.67 × 570.79
  4. Step 4: Simplify right side
    2,109.79x = 1,806,346.17
  5. Step 5: Solve for x
    x = 1,806,346.17/2,109.79
  6. Step 6: Final answer
    x = 856.18

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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.