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Finding the Fourth Proportional to 1,928.40, 2,889.72 and 953.16

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Solution

The fourth proportional to 1,928.40, 2,889.72 and 953.16 is: 1,428.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.40 : 2,889.72 = 953.16 : x
  2. Step 2: Convert to fraction form
    1,928.40/2,889.72 = 953.16/x
  3. Step 3: Cross multiply
    1,928.40x = 2,889.72 × 953.16
  4. Step 4: Simplify right side
    1,928.40x = 2,754,365.52
  5. Step 5: Solve for x
    x = 2,754,365.52/1,928.40
  6. Step 6: Final answer
    x = 1,428.32

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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.