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Finding the Fourth Proportional to 2,890.79, 4,332.07 and 2,159.52

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Solution

The fourth proportional to 2,890.79, 4,332.07 and 2,159.52 is: 3,236.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.79 : 4,332.07 = 2,159.52 : x
  2. Step 2: Convert to fraction form
    2,890.79/4,332.07 = 2,159.52/x
  3. Step 3: Cross multiply
    2,890.79x = 4,332.07 × 2,159.52
  4. Step 4: Simplify right side
    2,890.79x = 9,355,191.81
  5. Step 5: Solve for x
    x = 9,355,191.81/2,890.79
  6. Step 6: Final answer
    x = 3,236.21

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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.