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Finding the Fourth Proportional to 669.67, 924.40 and 448.54

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Solution

The fourth proportional to 669.67, 924.40 and 448.54 is: 619.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.67 : 924.40 = 448.54 : x
  2. Step 2: Convert to fraction form
    669.67/924.40 = 448.54/x
  3. Step 3: Cross multiply
    669.67x = 924.40 × 448.54
  4. Step 4: Simplify right side
    669.67x = 414,626.94
  5. Step 5: Solve for x
    x = 414,626.94/669.67
  6. Step 6: Final answer
    x = 619.15

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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.