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Finding the Fourth Proportional to 1,685.22, 2,526.63 and 644.34

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Solution

The fourth proportional to 1,685.22, 2,526.63 and 644.34 is: 966.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.22 : 2,526.63 = 644.34 : x
  2. Step 2: Convert to fraction form
    1,685.22/2,526.63 = 644.34/x
  3. Step 3: Cross multiply
    1,685.22x = 2,526.63 × 644.34
  4. Step 4: Simplify right side
    1,685.22x = 1,628,008.77
  5. Step 5: Solve for x
    x = 1,628,008.77/1,685.22
  6. Step 6: Final answer
    x = 966.05

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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.