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Finding the Fourth Proportional to 307.08, 457.80 and 282.72

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Solution

The fourth proportional to 307.08, 457.80 and 282.72 is: 421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.08 : 457.80 = 282.72 : x
  2. Step 2: Convert to fraction form
    307.08/457.80 = 282.72/x
  3. Step 3: Cross multiply
    307.08x = 457.80 × 282.72
  4. Step 4: Simplify right side
    307.08x = 129,429.22
  5. Step 5: Solve for x
    x = 129,429.22/307.08
  6. Step 6: Final answer
    x = 421.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.