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Finding the Fourth Proportional to 423.10, 633.03 and 279.10

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Solution

The fourth proportional to 423.10, 633.03 and 279.10 is: 417.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.10 : 633.03 = 279.10 : x
  2. Step 2: Convert to fraction form
    423.10/633.03 = 279.10/x
  3. Step 3: Cross multiply
    423.10x = 633.03 × 279.10
  4. Step 4: Simplify right side
    423.10x = 176,678.67
  5. Step 5: Solve for x
    x = 176,678.67/423.10
  6. Step 6: Final answer
    x = 417.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.