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Finding the Fourth Proportional to 669.12, 924.12 and 448.98

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Solution

The fourth proportional to 669.12, 924.12 and 448.98 is: 620.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.12 : 924.12 = 448.98 : x
  2. Step 2: Convert to fraction form
    669.12/924.12 = 448.98/x
  3. Step 3: Cross multiply
    669.12x = 924.12 × 448.98
  4. Step 4: Simplify right side
    669.12x = 414,911.40
  5. Step 5: Solve for x
    x = 414,911.40/669.12
  6. Step 6: Final answer
    x = 620.09

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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.