Home / 210.20-317.12-203.85

Finding the Fourth Proportional to 210.20, 317.12 and 203.85

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Solution

The fourth proportional to 210.20, 317.12 and 203.85 is: 307.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.20 : 317.12 = 203.85 : x
  2. Step 2: Convert to fraction form
    210.20/317.12 = 203.85/x
  3. Step 3: Cross multiply
    210.20x = 317.12 × 203.85
  4. Step 4: Simplify right side
    210.20x = 64,643.89
  5. Step 5: Solve for x
    x = 64,643.89/210.20
  6. Step 6: Final answer
    x = 307.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.