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Finding the Fourth Proportional to 527.36, 725.58 and 457.20

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Solution

The fourth proportional to 527.36, 725.58 and 457.20 is: 629.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.36 : 725.58 = 457.20 : x
  2. Step 2: Convert to fraction form
    527.36/725.58 = 457.20/x
  3. Step 3: Cross multiply
    527.36x = 725.58 × 457.20
  4. Step 4: Simplify right side
    527.36x = 331,735.18
  5. Step 5: Solve for x
    x = 331,735.18/527.36
  6. Step 6: Final answer
    x = 629.05

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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.