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Finding the Fourth Proportional to 525.76, 725.42 and 455.71

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Solution

The fourth proportional to 525.76, 725.42 and 455.71 is: 628.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.76 : 725.42 = 455.71 : x
  2. Step 2: Convert to fraction form
    525.76/725.42 = 455.71/x
  3. Step 3: Cross multiply
    525.76x = 725.42 × 455.71
  4. Step 4: Simplify right side
    525.76x = 330,581.83
  5. Step 5: Solve for x
    x = 330,581.83/525.76
  6. Step 6: Final answer
    x = 628.77

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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.