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Finding the Fourth Proportional to 1,756.82, 2,635.20 and 646.32

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Solution

The fourth proportional to 1,756.82, 2,635.20 and 646.32 is: 969.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,756.82 : 2,635.20 = 646.32 : x
  2. Step 2: Convert to fraction form
    1,756.82/2,635.20 = 646.32/x
  3. Step 3: Cross multiply
    1,756.82x = 2,635.20 × 646.32
  4. Step 4: Simplify right side
    1,756.82x = 1,703,182.46
  5. Step 5: Solve for x
    x = 1,703,182.46/1,756.82
  6. Step 6: Final answer
    x = 969.47

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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.