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Finding the Fourth Proportional to 1,956.07, 2,934.11 and 658.45

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Solution

The fourth proportional to 1,956.07, 2,934.11 and 658.45 is: 987.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956.07 : 2,934.11 = 658.45 : x
  2. Step 2: Convert to fraction form
    1,956.07/2,934.11 = 658.45/x
  3. Step 3: Cross multiply
    1,956.07x = 2,934.11 × 658.45
  4. Step 4: Simplify right side
    1,956.07x = 1,931,967.57
  5. Step 5: Solve for x
    x = 1,931,967.57/1,956.07
  6. Step 6: Final answer
    x = 987.68

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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.