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Finding the Fourth Proportional to 1,256.54, 1,884.54 and 434.66

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Solution

The fourth proportional to 1,256.54, 1,884.54 and 434.66 is: 651.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.54 : 1,884.54 = 434.66 : x
  2. Step 2: Convert to fraction form
    1,256.54/1,884.54 = 434.66/x
  3. Step 3: Cross multiply
    1,256.54x = 1,884.54 × 434.66
  4. Step 4: Simplify right side
    1,256.54x = 819,134.16
  5. Step 5: Solve for x
    x = 819,134.16/1,256.54
  6. Step 6: Final answer
    x = 651.90

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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.