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Finding the Fourth Proportional to 615.04, 920.64 and 549.12

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Solution

The fourth proportional to 615.04, 920.64 and 549.12 is: 821.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.04 : 920.64 = 549.12 : x
  2. Step 2: Convert to fraction form
    615.04/920.64 = 549.12/x
  3. Step 3: Cross multiply
    615.04x = 920.64 × 549.12
  4. Step 4: Simplify right side
    615.04x = 505,541.84
  5. Step 5: Solve for x
    x = 505,541.84/615.04
  6. Step 6: Final answer
    x = 821.97

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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.