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Finding the Fourth Proportional to 1,289.37, 1,934.04 and 315.48

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Solution

The fourth proportional to 1,289.37, 1,934.04 and 315.48 is: 473.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.37 : 1,934.04 = 315.48 : x
  2. Step 2: Convert to fraction form
    1,289.37/1,934.04 = 315.48/x
  3. Step 3: Cross multiply
    1,289.37x = 1,934.04 × 315.48
  4. Step 4: Simplify right side
    1,289.37x = 610,150.94
  5. Step 5: Solve for x
    x = 610,150.94/1,289.37
  6. Step 6: Final answer
    x = 473.22

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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.