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Finding the Fourth Proportional to 528.06, 787.37 and 521.67

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Solution

The fourth proportional to 528.06, 787.37 and 521.67 is: 777.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.06 : 787.37 = 521.67 : x
  2. Step 2: Convert to fraction form
    528.06/787.37 = 521.67/x
  3. Step 3: Cross multiply
    528.06x = 787.37 × 521.67
  4. Step 4: Simplify right side
    528.06x = 410,744.70
  5. Step 5: Solve for x
    x = 410,744.70/528.06
  6. Step 6: Final answer
    x = 777.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.