Home / 1,417.20-1,955.26-857.45

Finding the Fourth Proportional to 1,417.20, 1,955.26 and 857.45

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Solution

The fourth proportional to 1,417.20, 1,955.26 and 857.45 is: 1,183.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.20 : 1,955.26 = 857.45 : x
  2. Step 2: Convert to fraction form
    1,417.20/1,955.26 = 857.45/x
  3. Step 3: Cross multiply
    1,417.20x = 1,955.26 × 857.45
  4. Step 4: Simplify right side
    1,417.20x = 1,676,546.06
  5. Step 5: Solve for x
    x = 1,676,546.06/1,417.20
  6. Step 6: Final answer
    x = 1,183.00

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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.