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Finding the Fourth Proportional to 1,953.75, 2,931.92 and 913.83

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Solution

The fourth proportional to 1,953.75, 2,931.92 and 913.83 is: 1,371.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.75 : 2,931.92 = 913.83 : x
  2. Step 2: Convert to fraction form
    1,953.75/2,931.92 = 913.83/x
  3. Step 3: Cross multiply
    1,953.75x = 2,931.92 × 913.83
  4. Step 4: Simplify right side
    1,953.75x = 2,679,283.38
  5. Step 5: Solve for x
    x = 2,679,283.38/1,953.75
  6. Step 6: Final answer
    x = 1,371.35

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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.