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Finding the Fourth Proportional to 669.68, 924.28 and 436.80

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Solution

The fourth proportional to 669.68, 924.28 and 436.80 is: 602.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.68 : 924.28 = 436.80 : x
  2. Step 2: Convert to fraction form
    669.68/924.28 = 436.80/x
  3. Step 3: Cross multiply
    669.68x = 924.28 × 436.80
  4. Step 4: Simplify right side
    669.68x = 403,725.50
  5. Step 5: Solve for x
    x = 403,725.50/669.68
  6. Step 6: Final answer
    x = 602.86

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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.