Home / 1,289.49-1,934.26-315.60

Finding the Fourth Proportional to 1,289.49, 1,934.26 and 315.60

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Solution

The fourth proportional to 1,289.49, 1,934.26 and 315.60 is: 473.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.49 : 1,934.26 = 315.60 : x
  2. Step 2: Convert to fraction form
    1,289.49/1,934.26 = 315.60/x
  3. Step 3: Cross multiply
    1,289.49x = 1,934.26 × 315.60
  4. Step 4: Simplify right side
    1,289.49x = 610,452.46
  5. Step 5: Solve for x
    x = 610,452.46/1,289.49
  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.