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Finding the Fourth Proportional to 670.09, 924.40 and 449.10

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Solution

The fourth proportional to 670.09, 924.40 and 449.10 is: 619.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.09 : 924.40 = 449.10 : x
  2. Step 2: Convert to fraction form
    670.09/924.40 = 449.10/x
  3. Step 3: Cross multiply
    670.09x = 924.40 × 449.10
  4. Step 4: Simplify right side
    670.09x = 415,148.04
  5. Step 5: Solve for x
    x = 415,148.04/670.09
  6. Step 6: Final answer
    x = 619.54

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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.