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Finding the Fourth Proportional to 524, 786.32 and 220

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Solution

The fourth proportional to 524, 786.32 and 220 is: 330.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    524 : 786.32 = 220 : x
  2. Step 2: Convert to fraction form
    524/786.32 = 220/x
  3. Step 3: Cross multiply
    524x = 786.32 × 220
  4. Step 4: Simplify right side
    524x = 172,990.40
  5. Step 5: Solve for x
    x = 172,990.40/524
  6. Step 6: Final answer
    x = 330.13

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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.