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Finding the Fourth Proportional to 1,638.51, 2,457.23 and 713.80

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Solution

The fourth proportional to 1,638.51, 2,457.23 and 713.80 is: 1,070.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.51 : 2,457.23 = 713.80 : x
  2. Step 2: Convert to fraction form
    1,638.51/2,457.23 = 713.80/x
  3. Step 3: Cross multiply
    1,638.51x = 2,457.23 × 713.80
  4. Step 4: Simplify right side
    1,638.51x = 1,753,966.42
  5. Step 5: Solve for x
    x = 1,753,966.42/1,638.51
  6. Step 6: Final answer
    x = 1,070.46

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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.