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Finding the Fourth Proportional to 615.45, 921.83 and 477.42

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Solution

The fourth proportional to 615.45, 921.83 and 477.42 is: 715.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.45 : 921.83 = 477.42 : x
  2. Step 2: Convert to fraction form
    615.45/921.83 = 477.42/x
  3. Step 3: Cross multiply
    615.45x = 921.83 × 477.42
  4. Step 4: Simplify right side
    615.45x = 440,097.69
  5. Step 5: Solve for x
    x = 440,097.69/615.45
  6. Step 6: Final answer
    x = 715.08

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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.