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Finding the Fourth Proportional to 483.30, 666.93 and 308.70

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Solution

The fourth proportional to 483.30, 666.93 and 308.70 is: 425.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.30 : 666.93 = 308.70 : x
  2. Step 2: Convert to fraction form
    483.30/666.93 = 308.70/x
  3. Step 3: Cross multiply
    483.30x = 666.93 × 308.70
  4. Step 4: Simplify right side
    483.30x = 205,881.29
  5. Step 5: Solve for x
    x = 205,881.29/483.30
  6. Step 6: Final answer
    x = 425.99

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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.