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Finding the Fourth Proportional to 501.80, 752.09 and 318.94

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Solution

The fourth proportional to 501.80, 752.09 and 318.94 is: 478.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.80 : 752.09 = 318.94 : x
  2. Step 2: Convert to fraction form
    501.80/752.09 = 318.94/x
  3. Step 3: Cross multiply
    501.80x = 752.09 × 318.94
  4. Step 4: Simplify right side
    501.80x = 239,868.11
  5. Step 5: Solve for x
    x = 239,868.11/501.80
  6. Step 6: Final answer
    x = 478.02

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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.