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Finding the Fourth Proportional to 525.83, 725.66 and 289.77

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Solution

The fourth proportional to 525.83, 725.66 and 289.77 is: 399.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.83 : 725.66 = 289.77 : x
  2. Step 2: Convert to fraction form
    525.83/725.66 = 289.77/x
  3. Step 3: Cross multiply
    525.83x = 725.66 × 289.77
  4. Step 4: Simplify right side
    525.83x = 210,270.87
  5. Step 5: Solve for x
    x = 210,270.87/525.83
  6. Step 6: Final answer
    x = 399.88

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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.