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Finding the Fourth Proportional to 525, 787.90 and 403.50

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Solution

The fourth proportional to 525, 787.90 and 403.50 is: 605.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    525 : 787.90 = 403.50 : x
  2. Step 2: Convert to fraction form
    525/787.90 = 403.50/x
  3. Step 3: Cross multiply
    525x = 787.90 × 403.50
  4. Step 4: Simplify right side
    525x = 317,917.65
  5. Step 5: Solve for x
    x = 317,917.65/525
  6. Step 6: Final answer
    x = 605.56

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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.