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Finding the Fourth Proportional to 595.78, 821.90 and 548.40

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Solution

The fourth proportional to 595.78, 821.90 and 548.40 is: 756.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    595.78 : 821.90 = 548.40 : x
  2. Step 2: Convert to fraction form
    595.78/821.90 = 548.40/x
  3. Step 3: Cross multiply
    595.78x = 821.90 × 548.40
  4. Step 4: Simplify right side
    595.78x = 450,729.96
  5. Step 5: Solve for x
    x = 450,729.96/595.78
  6. Step 6: Final answer
    x = 756.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.