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Finding the Fourth Proportional to 526.79, 727.46 and 395.57

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Solution

The fourth proportional to 526.79, 727.46 and 395.57 is: 546.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.79 : 727.46 = 395.57 : x
  2. Step 2: Convert to fraction form
    526.79/727.46 = 395.57/x
  3. Step 3: Cross multiply
    526.79x = 727.46 × 395.57
  4. Step 4: Simplify right side
    526.79x = 287,755.74
  5. Step 5: Solve for x
    x = 287,755.74/526.79
  6. Step 6: Final answer
    x = 546.25

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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.