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Finding the Fourth Proportional to 526.09, 725.94 and 305

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Solution

The fourth proportional to 526.09, 725.94 and 305 is: 420.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.09 : 725.94 = 305 : x
  2. Step 2: Convert to fraction form
    526.09/725.94 = 305/x
  3. Step 3: Cross multiply
    526.09x = 725.94 × 305
  4. Step 4: Simplify right side
    526.09x = 221,411.70
  5. Step 5: Solve for x
    x = 221,411.70/526.09
  6. Step 6: Final answer
    x = 420.86

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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.