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Finding the Fourth Proportional to 654.48, 980.90 and 307.35

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Solution

The fourth proportional to 654.48, 980.90 and 307.35 is: 460.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.48 : 980.90 = 307.35 : x
  2. Step 2: Convert to fraction form
    654.48/980.90 = 307.35/x
  3. Step 3: Cross multiply
    654.48x = 980.90 × 307.35
  4. Step 4: Simplify right side
    654.48x = 301,478.08
  5. Step 5: Solve for x
    x = 301,478.08/654.48
  6. Step 6: Final answer
    x = 460.64

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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.