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Finding the Fourth Proportional to 1,757.63, 2,636.56 and 647.35

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Solution

The fourth proportional to 1,757.63, 2,636.56 and 647.35 is: 971.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,757.63 : 2,636.56 = 647.35 : x
  2. Step 2: Convert to fraction form
    1,757.63/2,636.56 = 647.35/x
  3. Step 3: Cross multiply
    1,757.63x = 2,636.56 × 647.35
  4. Step 4: Simplify right side
    1,757.63x = 1,706,768.91
  5. Step 5: Solve for x
    x = 1,706,768.91/1,757.63
  6. Step 6: Final answer
    x = 971.06

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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.