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Finding the Fourth Proportional to 359,992.80, 539,643.60 and 279,986.40

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Solution

The fourth proportional to 359,992.80, 539,643.60 and 279,986.40 is: 419,710.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,992.80 : 539,643.60 = 279,986.40 : x
  2. Step 2: Convert to fraction form
    359,992.80/539,643.60 = 279,986.40/x
  3. Step 3: Cross multiply
    359,992.80x = 539,643.60 × 279,986.40
  4. Step 4: Simplify right side
    359,992.80x = 151,092,868,847.04
  5. Step 5: Solve for x
    x = 151,092,868,847.04/359,992.80
  6. Step 6: Final answer
    x = 419,710.81

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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.