Home / 1,289.51-1,934.25-315.61

Finding the Fourth Proportional to 1,289.51, 1,934.25 and 315.61

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Solution

The fourth proportional to 1,289.51, 1,934.25 and 315.61 is: 473.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.51 : 1,934.25 = 315.61 : x
  2. Step 2: Convert to fraction form
    1,289.51/1,934.25 = 315.61/x
  3. Step 3: Cross multiply
    1,289.51x = 1,934.25 × 315.61
  4. Step 4: Simplify right side
    1,289.51x = 610,468.64
  5. Step 5: Solve for x
    x = 610,468.64/1,289.51
  6. Step 6: Final answer
    x = 473.41

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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.