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Finding the Fourth Proportional to 1,318.19, 1,976.38 and 948.23

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Solution

The fourth proportional to 1,318.19, 1,976.38 and 948.23 is: 1,421.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.19 : 1,976.38 = 948.23 : x
  2. Step 2: Convert to fraction form
    1,318.19/1,976.38 = 948.23/x
  3. Step 3: Cross multiply
    1,318.19x = 1,976.38 × 948.23
  4. Step 4: Simplify right side
    1,318.19x = 1,874,048.18
  5. Step 5: Solve for x
    x = 1,874,048.18/1,318.19
  6. Step 6: Final answer
    x = 1,421.68

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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.