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Finding the Fourth Proportional to 1,964.81, 2,947.58 and 648.66

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Solution

The fourth proportional to 1,964.81, 2,947.58 and 648.66 is: 973.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.81 : 2,947.58 = 648.66 : x
  2. Step 2: Convert to fraction form
    1,964.81/2,947.58 = 648.66/x
  3. Step 3: Cross multiply
    1,964.81x = 2,947.58 × 648.66
  4. Step 4: Simplify right side
    1,964.81x = 1,911,972.31
  5. Step 5: Solve for x
    x = 1,911,972.31/1,964.81
  6. Step 6: Final answer
    x = 973.11

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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.