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Finding the Fourth Proportional to 501.21, 750.48 and 438.96

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Solution

The fourth proportional to 501.21, 750.48 and 438.96 is: 657.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.21 : 750.48 = 438.96 : x
  2. Step 2: Convert to fraction form
    501.21/750.48 = 438.96/x
  3. Step 3: Cross multiply
    501.21x = 750.48 × 438.96
  4. Step 4: Simplify right side
    501.21x = 329,430.70
  5. Step 5: Solve for x
    x = 329,430.70/501.21
  6. Step 6: Final answer
    x = 657.27

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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.