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Finding the Fourth Proportional to 525.76, 787.42 and 480

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Solution

The fourth proportional to 525.76, 787.42 and 480 is: 718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.76 : 787.42 = 480 : x
  2. Step 2: Convert to fraction form
    525.76/787.42 = 480/x
  3. Step 3: Cross multiply
    525.76x = 787.42 × 480
  4. Step 4: Simplify right side
    525.76x = 377,961.60
  5. Step 5: Solve for x
    x = 377,961.60/525.76
  6. Step 6: Final answer
    x = 718.89

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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.