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Finding the Fourth Proportional to 3,312.80, 4,570.05 and 1,986.02

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Solution

The fourth proportional to 3,312.80, 4,570.05 and 1,986.02 is: 2,739.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.80 : 4,570.05 = 1,986.02 : x
  2. Step 2: Convert to fraction form
    3,312.80/4,570.05 = 1,986.02/x
  3. Step 3: Cross multiply
    3,312.80x = 4,570.05 × 1,986.02
  4. Step 4: Simplify right side
    3,312.80x = 9,076,210.70
  5. Step 5: Solve for x
    x = 9,076,210.70/3,312.80
  6. Step 6: Final answer
    x = 2,739.74

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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.