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Finding the Fourth Proportional to 1,963.76, 2,944.20 and 647.09

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Solution

The fourth proportional to 1,963.76, 2,944.20 and 647.09 is: 970.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,963.76 : 2,944.20 = 647.09 : x
  2. Step 2: Convert to fraction form
    1,963.76/2,944.20 = 647.09/x
  3. Step 3: Cross multiply
    1,963.76x = 2,944.20 × 647.09
  4. Step 4: Simplify right side
    1,963.76x = 1,905,162.38
  5. Step 5: Solve for x
    x = 1,905,162.38/1,963.76
  6. Step 6: Final answer
    x = 970.16

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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.