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Finding the Fourth Proportional to 837.83, 1,256.70 and 318.06

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Solution

The fourth proportional to 837.83, 1,256.70 and 318.06 is: 477.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.83 : 1,256.70 = 318.06 : x
  2. Step 2: Convert to fraction form
    837.83/1,256.70 = 318.06/x
  3. Step 3: Cross multiply
    837.83x = 1,256.70 × 318.06
  4. Step 4: Simplify right side
    837.83x = 399,706.00
  5. Step 5: Solve for x
    x = 399,706.00/837.83
  6. Step 6: Final answer
    x = 477.07

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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.