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Finding the Fourth Proportional to 525.64, 725.51 and 304.72

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Solution

The fourth proportional to 525.64, 725.51 and 304.72 is: 420.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.64 : 725.51 = 304.72 : x
  2. Step 2: Convert to fraction form
    525.64/725.51 = 304.72/x
  3. Step 3: Cross multiply
    525.64x = 725.51 × 304.72
  4. Step 4: Simplify right side
    525.64x = 221,077.41
  5. Step 5: Solve for x
    x = 221,077.41/525.64
  6. Step 6: Final answer
    x = 420.59

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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.