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Finding the Fourth Proportional to 473.99, 711.07 and 257.45

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Solution

The fourth proportional to 473.99, 711.07 and 257.45 is: 386.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.99 : 711.07 = 257.45 : x
  2. Step 2: Convert to fraction form
    473.99/711.07 = 257.45/x
  3. Step 3: Cross multiply
    473.99x = 711.07 × 257.45
  4. Step 4: Simplify right side
    473.99x = 183,060.77
  5. Step 5: Solve for x
    x = 183,060.77/473.99
  6. Step 6: Final answer
    x = 386.22

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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.