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Finding the Fourth Proportional to 1,790.89, 2,685.65 and 695.00

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Solution

The fourth proportional to 1,790.89, 2,685.65 and 695.00 is: 1,042.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.89 : 2,685.65 = 695.00 : x
  2. Step 2: Convert to fraction form
    1,790.89/2,685.65 = 695.00/x
  3. Step 3: Cross multiply
    1,790.89x = 2,685.65 × 695.00
  4. Step 4: Simplify right side
    1,790.89x = 1,866,526.17
  5. Step 5: Solve for x
    x = 1,866,526.17/1,790.89
  6. Step 6: Final answer
    x = 1,042.23

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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.