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Finding the Fourth Proportional to 1,261.58, 1,893.75 and 956.77

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Solution

The fourth proportional to 1,261.58, 1,893.75 and 956.77 is: 1,436.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.58 : 1,893.75 = 956.77 : x
  2. Step 2: Convert to fraction form
    1,261.58/1,893.75 = 956.77/x
  3. Step 3: Cross multiply
    1,261.58x = 1,893.75 × 956.77
  4. Step 4: Simplify right side
    1,261.58x = 1,811,883.19
  5. Step 5: Solve for x
    x = 1,811,883.19/1,261.58
  6. Step 6: Final answer
    x = 1,436.20

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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.