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Finding the Fourth Proportional to 525.59, 725.09 and 315.77

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Solution

The fourth proportional to 525.59, 725.09 and 315.77 is: 435.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.59 : 725.09 = 315.77 : x
  2. Step 2: Convert to fraction form
    525.59/725.09 = 315.77/x
  3. Step 3: Cross multiply
    525.59x = 725.09 × 315.77
  4. Step 4: Simplify right side
    525.59x = 228,956.47
  5. Step 5: Solve for x
    x = 228,956.47/525.59
  6. Step 6: Final answer
    x = 435.62

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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.