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Finding the Fourth Proportional to 526.11, 787.80 and 281.44

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Solution

The fourth proportional to 526.11, 787.80 and 281.44 is: 421.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.11 : 787.80 = 281.44 : x
  2. Step 2: Convert to fraction form
    526.11/787.80 = 281.44/x
  3. Step 3: Cross multiply
    526.11x = 787.80 × 281.44
  4. Step 4: Simplify right side
    526.11x = 221,715.06
  5. Step 5: Solve for x
    x = 221,715.06/526.11
  6. Step 6: Final answer
    x = 421.42

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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.