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Finding the Fourth Proportional to 615.68, 923.72 and 307.64

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Solution

The fourth proportional to 615.68, 923.72 and 307.64 is: 461.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.68 : 923.72 = 307.64 : x
  2. Step 2: Convert to fraction form
    615.68/923.72 = 307.64/x
  3. Step 3: Cross multiply
    615.68x = 923.72 × 307.64
  4. Step 4: Simplify right side
    615.68x = 284,173.22
  5. Step 5: Solve for x
    x = 284,173.22/615.68
  6. Step 6: Final answer
    x = 461.56

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1.5x scale

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.