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Finding the Fourth Proportional to 525.36, 787.28 and 380.72

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Solution

The fourth proportional to 525.36, 787.28 and 380.72 is: 570.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.36 : 787.28 = 380.72 : x
  2. Step 2: Convert to fraction form
    525.36/787.28 = 380.72/x
  3. Step 3: Cross multiply
    525.36x = 787.28 × 380.72
  4. Step 4: Simplify right side
    525.36x = 299,733.24
  5. Step 5: Solve for x
    x = 299,733.24/525.36
  6. Step 6: Final answer
    x = 570.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.