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Finding the Fourth Proportional to 525.43, 725.10 and 289.38

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Solution

The fourth proportional to 525.43, 725.10 and 289.38 is: 399.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.43 : 725.10 = 289.38 : x
  2. Step 2: Convert to fraction form
    525.43/725.10 = 289.38/x
  3. Step 3: Cross multiply
    525.43x = 725.10 × 289.38
  4. Step 4: Simplify right side
    525.43x = 209,827.99
  5. Step 5: Solve for x
    x = 209,827.99/525.43
  6. Step 6: Final answer
    x = 399.35

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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.