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Finding the Fourth Proportional to 469.65, 704.55 and 209.74

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Solution

The fourth proportional to 469.65, 704.55 and 209.74 is: 314.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.65 : 704.55 = 209.74 : x
  2. Step 2: Convert to fraction form
    469.65/704.55 = 209.74/x
  3. Step 3: Cross multiply
    469.65x = 704.55 × 209.74
  4. Step 4: Simplify right side
    469.65x = 147,772.32
  5. Step 5: Solve for x
    x = 147,772.32/469.65
  6. Step 6: Final answer
    x = 314.64

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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.