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Finding the Fourth Proportional to 340.77, 509.94 and 317.89

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Solution

The fourth proportional to 340.77, 509.94 and 317.89 is: 475.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.77 : 509.94 = 317.89 : x
  2. Step 2: Convert to fraction form
    340.77/509.94 = 317.89/x
  3. Step 3: Cross multiply
    340.77x = 509.94 × 317.89
  4. Step 4: Simplify right side
    340.77x = 162,100.69
  5. Step 5: Solve for x
    x = 162,100.69/340.77
  6. Step 6: Final answer
    x = 475.69

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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.