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Finding the Fourth Proportional to 615.03, 921.46 and 548.07

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Solution

The fourth proportional to 615.03, 921.46 and 548.07 is: 821.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.03 : 921.46 = 548.07 : x
  2. Step 2: Convert to fraction form
    615.03/921.46 = 548.07/x
  3. Step 3: Cross multiply
    615.03x = 921.46 × 548.07
  4. Step 4: Simplify right side
    615.03x = 505,024.58
  5. Step 5: Solve for x
    x = 505,024.58/615.03
  6. Step 6: Final answer
    x = 821.14

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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.