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Finding the Fourth Proportional to 526.56, 787.95 and 321.18

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Solution

The fourth proportional to 526.56, 787.95 and 321.18 is: 480.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.56 : 787.95 = 321.18 : x
  2. Step 2: Convert to fraction form
    526.56/787.95 = 321.18/x
  3. Step 3: Cross multiply
    526.56x = 787.95 × 321.18
  4. Step 4: Simplify right side
    526.56x = 253,073.78
  5. Step 5: Solve for x
    x = 253,073.78/526.56
  6. Step 6: Final answer
    x = 480.62

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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.