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Finding the Fourth Proportional to 359.95, 539.93 and 143.53

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Solution

The fourth proportional to 359.95, 539.93 and 143.53 is: 215.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.95 : 539.93 = 143.53 : x
  2. Step 2: Convert to fraction form
    359.95/539.93 = 143.53/x
  3. Step 3: Cross multiply
    359.95x = 539.93 × 143.53
  4. Step 4: Simplify right side
    359.95x = 77,496.15
  5. Step 5: Solve for x
    x = 77,496.15/359.95
  6. Step 6: Final answer
    x = 215.30

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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.