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Finding the Fourth Proportional to 306, 420.93 and 292.59

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Solution

The fourth proportional to 306, 420.93 and 292.59 is: 402.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    306 : 420.93 = 292.59 : x
  2. Step 2: Convert to fraction form
    306/420.93 = 292.59/x
  3. Step 3: Cross multiply
    306x = 420.93 × 292.59
  4. Step 4: Simplify right side
    306x = 123,159.91
  5. Step 5: Solve for x
    x = 123,159.91/306
  6. Step 6: Final answer
    x = 402.48

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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.