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Finding the Fourth Proportional to 527.01, 727.48 and 396.40

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Solution

The fourth proportional to 527.01, 727.48 and 396.40 is: 547.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.01 : 727.48 = 396.40 : x
  2. Step 2: Convert to fraction form
    527.01/727.48 = 396.40/x
  3. Step 3: Cross multiply
    527.01x = 727.48 × 396.40
  4. Step 4: Simplify right side
    527.01x = 288,373.07
  5. Step 5: Solve for x
    x = 288,373.07/527.01
  6. Step 6: Final answer
    x = 547.19

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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.