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Finding the Fourth Proportional to 1,014.71, 1,521.83 and 389.88

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Solution

The fourth proportional to 1,014.71, 1,521.83 and 389.88 is: 584.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.71 : 1,521.83 = 389.88 : x
  2. Step 2: Convert to fraction form
    1,014.71/1,521.83 = 389.88/x
  3. Step 3: Cross multiply
    1,014.71x = 1,521.83 × 389.88
  4. Step 4: Simplify right side
    1,014.71x = 593,332.06
  5. Step 5: Solve for x
    x = 593,332.06/1,014.71
  6. Step 6: Final answer
    x = 584.73

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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.