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Finding the Fourth Proportional to 359.07, 539.15 and 318.75

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Solution

The fourth proportional to 359.07, 539.15 and 318.75 is: 478.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.07 : 539.15 = 318.75 : x
  2. Step 2: Convert to fraction form
    359.07/539.15 = 318.75/x
  3. Step 3: Cross multiply
    359.07x = 539.15 × 318.75
  4. Step 4: Simplify right side
    359.07x = 171,852.47
  5. Step 5: Solve for x
    x = 171,852.47/359.07
  6. Step 6: Final answer
    x = 478.60

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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.