Home / 1,288.70-1,933.05-314.81

Finding the Fourth Proportional to 1,288.70, 1,933.05 and 314.81

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Solution

The fourth proportional to 1,288.70, 1,933.05 and 314.81 is: 472.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.70 : 1,933.05 = 314.81 : x
  2. Step 2: Convert to fraction form
    1,288.70/1,933.05 = 314.81/x
  3. Step 3: Cross multiply
    1,288.70x = 1,933.05 × 314.81
  4. Step 4: Simplify right side
    1,288.70x = 608,543.47
  5. Step 5: Solve for x
    x = 608,543.47/1,288.70
  6. Step 6: Final answer
    x = 472.22

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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.