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Finding the Fourth Proportional to 482.50, 665.85 and 307.95

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Solution

The fourth proportional to 482.50, 665.85 and 307.95 is: 424.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.50 : 665.85 = 307.95 : x
  2. Step 2: Convert to fraction form
    482.50/665.85 = 307.95/x
  3. Step 3: Cross multiply
    482.50x = 665.85 × 307.95
  4. Step 4: Simplify right side
    482.50x = 205,048.51
  5. Step 5: Solve for x
    x = 205,048.51/482.50
  6. Step 6: Final answer
    x = 424.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.