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Finding the Fourth Proportional to 615.02, 921.99 and 486.50

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Solution

The fourth proportional to 615.02, 921.99 and 486.50 is: 729.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.02 : 921.99 = 486.50 : x
  2. Step 2: Convert to fraction form
    615.02/921.99 = 486.50/x
  3. Step 3: Cross multiply
    615.02x = 921.99 × 486.50
  4. Step 4: Simplify right side
    615.02x = 448,548.14
  5. Step 5: Solve for x
    x = 448,548.14/615.02
  6. Step 6: Final answer
    x = 729.32

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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.