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Finding the Fourth Proportional to 1,417.66, 1,955.92 and 857.95

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Solution

The fourth proportional to 1,417.66, 1,955.92 and 857.95 is: 1,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.66 : 1,955.92 = 857.95 : x
  2. Step 2: Convert to fraction form
    1,417.66/1,955.92 = 857.95/x
  3. Step 3: Cross multiply
    1,417.66x = 1,955.92 × 857.95
  4. Step 4: Simplify right side
    1,417.66x = 1,678,076.97
  5. Step 5: Solve for x
    x = 1,678,076.97/1,417.66
  6. Step 6: Final answer
    x = 1,183.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.