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Finding the Fourth Proportional to 1,398.90, 1,928.23 and 950.64

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Solution

The fourth proportional to 1,398.90, 1,928.23 and 950.64 is: 1,310.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.90 : 1,928.23 = 950.64 : x
  2. Step 2: Convert to fraction form
    1,398.90/1,928.23 = 950.64/x
  3. Step 3: Cross multiply
    1,398.90x = 1,928.23 × 950.64
  4. Step 4: Simplify right side
    1,398.90x = 1,833,052.57
  5. Step 5: Solve for x
    x = 1,833,052.57/1,398.90
  6. Step 6: Final answer
    x = 1,310.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.