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Finding the Fourth Proportional to 669.96, 924.35 and 407.79

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Solution

The fourth proportional to 669.96, 924.35 and 407.79 is: 562.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.96 : 924.35 = 407.79 : x
  2. Step 2: Convert to fraction form
    669.96/924.35 = 407.79/x
  3. Step 3: Cross multiply
    669.96x = 924.35 × 407.79
  4. Step 4: Simplify right side
    669.96x = 376,938.65
  5. Step 5: Solve for x
    x = 376,938.65/669.96
  6. Step 6: Final answer
    x = 562.63

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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.