Home / 1,020.30-1,530.55-317.52

Finding the Fourth Proportional to 1,020.30, 1,530.55 and 317.52

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Solution

The fourth proportional to 1,020.30, 1,530.55 and 317.52 is: 476.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.30 : 1,530.55 = 317.52 : x
  2. Step 2: Convert to fraction form
    1,020.30/1,530.55 = 317.52/x
  3. Step 3: Cross multiply
    1,020.30x = 1,530.55 × 317.52
  4. Step 4: Simplify right side
    1,020.30x = 485,978.85
  5. Step 5: Solve for x
    x = 485,978.85/1,020.30
  6. Step 6: Final answer
    x = 476.31

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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.