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Finding the Fourth Proportional to 669.92, 924.75 and 448.79

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Solution

The fourth proportional to 669.92, 924.75 and 448.79 is: 619.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.92 : 924.75 = 448.79 : x
  2. Step 2: Convert to fraction form
    669.92/924.75 = 448.79/x
  3. Step 3: Cross multiply
    669.92x = 924.75 × 448.79
  4. Step 4: Simplify right side
    669.92x = 415,016.31
  5. Step 5: Solve for x
    x = 415,016.31/669.92
  6. Step 6: Final answer
    x = 619.50

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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.