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Finding the Fourth Proportional to 670.27, 924.80 and 449.34

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Solution

The fourth proportional to 670.27, 924.80 and 449.34 is: 619.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.27 : 924.80 = 449.34 : x
  2. Step 2: Convert to fraction form
    670.27/924.80 = 449.34/x
  3. Step 3: Cross multiply
    670.27x = 924.80 × 449.34
  4. Step 4: Simplify right side
    670.27x = 415,549.63
  5. Step 5: Solve for x
    x = 415,549.63/670.27
  6. Step 6: Final answer
    x = 619.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.