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Finding the Fourth Proportional to 1,295.82, 1,943.61 and 646.98

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Solution

The fourth proportional to 1,295.82, 1,943.61 and 646.98 is: 970.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.82 : 1,943.61 = 646.98 : x
  2. Step 2: Convert to fraction form
    1,295.82/1,943.61 = 646.98/x
  3. Step 3: Cross multiply
    1,295.82x = 1,943.61 × 646.98
  4. Step 4: Simplify right side
    1,295.82x = 1,257,476.80
  5. Step 5: Solve for x
    x = 1,257,476.80/1,295.82
  6. Step 6: Final answer
    x = 970.41

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1.5x scale

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.