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Finding the Fourth Proportional to 525.15, 724.70 and 328.77

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Solution

The fourth proportional to 525.15, 724.70 and 328.77 is: 453.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.15 : 724.70 = 328.77 : x
  2. Step 2: Convert to fraction form
    525.15/724.70 = 328.77/x
  3. Step 3: Cross multiply
    525.15x = 724.70 × 328.77
  4. Step 4: Simplify right side
    525.15x = 238,257.98
  5. Step 5: Solve for x
    x = 238,257.98/525.15
  6. Step 6: Final answer
    x = 453.70

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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.