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Finding the Fourth Proportional to 501.69, 752.90 and 405.34

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Solution

The fourth proportional to 501.69, 752.90 and 405.34 is: 608.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.69 : 752.90 = 405.34 : x
  2. Step 2: Convert to fraction form
    501.69/752.90 = 405.34/x
  3. Step 3: Cross multiply
    501.69x = 752.90 × 405.34
  4. Step 4: Simplify right side
    501.69x = 305,180.49
  5. Step 5: Solve for x
    x = 305,180.49/501.69
  6. Step 6: Final answer
    x = 608.30

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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.