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Finding the Fourth Proportional to 2,790.40, 4,185.63 and 710.41

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Solution

The fourth proportional to 2,790.40, 4,185.63 and 710.41 is: 1,065.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.40 : 4,185.63 = 710.41 : x
  2. Step 2: Convert to fraction form
    2,790.40/4,185.63 = 710.41/x
  3. Step 3: Cross multiply
    2,790.40x = 4,185.63 × 710.41
  4. Step 4: Simplify right side
    2,790.40x = 2,973,509.79
  5. Step 5: Solve for x
    x = 2,973,509.79/2,790.40
  6. Step 6: Final answer
    x = 1,065.62

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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.