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Finding the Fourth Proportional to 1,877.80, 2,816.70 and 1,646.95

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Solution

The fourth proportional to 1,877.80, 2,816.70 and 1,646.95 is: 2,470.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.80 : 2,816.70 = 1,646.95 : x
  2. Step 2: Convert to fraction form
    1,877.80/2,816.70 = 1,646.95/x
  3. Step 3: Cross multiply
    1,877.80x = 2,816.70 × 1,646.95
  4. Step 4: Simplify right side
    1,877.80x = 4,638,964.07
  5. Step 5: Solve for x
    x = 4,638,964.07/1,877.80
  6. Step 6: Final answer
    x = 2,470.43

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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.