Home / 841.18-1,261.95-321.34

Finding the Fourth Proportional to 841.18, 1,261.95 and 321.34

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Solution

The fourth proportional to 841.18, 1,261.95 and 321.34 is: 482.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.18 : 1,261.95 = 321.34 : x
  2. Step 2: Convert to fraction form
    841.18/1,261.95 = 321.34/x
  3. Step 3: Cross multiply
    841.18x = 1,261.95 × 321.34
  4. Step 4: Simplify right side
    841.18x = 405,515.01
  5. Step 5: Solve for x
    x = 405,515.01/841.18
  6. Step 6: Final answer
    x = 482.08

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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.