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Finding the Fourth Proportional to 1,685.30, 2,526.94 and 630.68

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Solution

The fourth proportional to 1,685.30, 2,526.94 and 630.68 is: 945.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.30 : 2,526.94 = 630.68 : x
  2. Step 2: Convert to fraction form
    1,685.30/2,526.94 = 630.68/x
  3. Step 3: Cross multiply
    1,685.30x = 2,526.94 × 630.68
  4. Step 4: Simplify right side
    1,685.30x = 1,593,687.37
  5. Step 5: Solve for x
    x = 1,593,687.37/1,685.30
  6. Step 6: Final answer
    x = 945.64

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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.