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Finding the Fourth Proportional to 1,975.72, 2,963.58 and 949

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Solution

The fourth proportional to 1,975.72, 2,963.58 and 949 is: 1,423.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,975.72 : 2,963.58 = 949 : x
  2. Step 2: Convert to fraction form
    1,975.72/2,963.58 = 949/x
  3. Step 3: Cross multiply
    1,975.72x = 2,963.58 × 949
  4. Step 4: Simplify right side
    1,975.72x = 2,812,437.42
  5. Step 5: Solve for x
    x = 2,812,437.42/1,975.72
  6. Step 6: Final answer
    x = 1,423.50

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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.