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Finding the Fourth Proportional to 1,060.39, 1,590.65 and 329.99

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Solution

The fourth proportional to 1,060.39, 1,590.65 and 329.99 is: 495.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.39 : 1,590.65 = 329.99 : x
  2. Step 2: Convert to fraction form
    1,060.39/1,590.65 = 329.99/x
  3. Step 3: Cross multiply
    1,060.39x = 1,590.65 × 329.99
  4. Step 4: Simplify right side
    1,060.39x = 524,896.94
  5. Step 5: Solve for x
    x = 524,896.94/1,060.39
  6. Step 6: Final answer
    x = 495.01

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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.