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Finding the Fourth Proportional to 473.40, 709.26 and 257.10

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Solution

The fourth proportional to 473.40, 709.26 and 257.10 is: 385.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.40 : 709.26 = 257.10 : x
  2. Step 2: Convert to fraction form
    473.40/709.26 = 257.10/x
  3. Step 3: Cross multiply
    473.40x = 709.26 × 257.10
  4. Step 4: Simplify right side
    473.40x = 182,350.75
  5. Step 5: Solve for x
    x = 182,350.75/473.40
  6. Step 6: Final answer
    x = 385.19

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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.