Home / 1,139.30-1,708.75-317.37

Finding the Fourth Proportional to 1,139.30, 1,708.75 and 317.37

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Solution

The fourth proportional to 1,139.30, 1,708.75 and 317.37 is: 476.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.30 : 1,708.75 = 317.37 : x
  2. Step 2: Convert to fraction form
    1,139.30/1,708.75 = 317.37/x
  3. Step 3: Cross multiply
    1,139.30x = 1,708.75 × 317.37
  4. Step 4: Simplify right side
    1,139.30x = 542,305.99
  5. Step 5: Solve for x
    x = 542,305.99/1,139.30
  6. Step 6: Final answer
    x = 476.00

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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.