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Finding the Fourth Proportional to 609.19, 912.68 and 257.01

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Solution

The fourth proportional to 609.19, 912.68 and 257.01 is: 385.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.19 : 912.68 = 257.01 : x
  2. Step 2: Convert to fraction form
    609.19/912.68 = 257.01/x
  3. Step 3: Cross multiply
    609.19x = 912.68 × 257.01
  4. Step 4: Simplify right side
    609.19x = 234,565.59
  5. Step 5: Solve for x
    x = 234,565.59/609.19
  6. Step 6: Final answer
    x = 385.05

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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.