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Finding the Fourth Proportional to 964.71, 1,447.02 and 387.99

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Solution

The fourth proportional to 964.71, 1,447.02 and 387.99 is: 581.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.71 : 1,447.02 = 387.99 : x
  2. Step 2: Convert to fraction form
    964.71/1,447.02 = 387.99/x
  3. Step 3: Cross multiply
    964.71x = 1,447.02 × 387.99
  4. Step 4: Simplify right side
    964.71x = 561,429.29
  5. Step 5: Solve for x
    x = 561,429.29/964.71
  6. Step 6: Final answer
    x = 581.97

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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.