Home / 1,087.24-1,631.02-317.80

Finding the Fourth Proportional to 1,087.24, 1,631.02 and 317.80

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Solution

The fourth proportional to 1,087.24, 1,631.02 and 317.80 is: 476.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.24 : 1,631.02 = 317.80 : x
  2. Step 2: Convert to fraction form
    1,087.24/1,631.02 = 317.80/x
  3. Step 3: Cross multiply
    1,087.24x = 1,631.02 × 317.80
  4. Step 4: Simplify right side
    1,087.24x = 518,338.16
  5. Step 5: Solve for x
    x = 518,338.16/1,087.24
  6. Step 6: Final answer
    x = 476.75

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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.