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Finding the Fourth Proportional to 501.20, 750.09 and 318.68

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Solution

The fourth proportional to 501.20, 750.09 and 318.68 is: 476.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.20 : 750.09 = 318.68 : x
  2. Step 2: Convert to fraction form
    501.20/750.09 = 318.68/x
  3. Step 3: Cross multiply
    501.20x = 750.09 × 318.68
  4. Step 4: Simplify right side
    501.20x = 239,038.68
  5. Step 5: Solve for x
    x = 239,038.68/501.20
  6. Step 6: Final answer
    x = 476.93

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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.