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Finding the Fourth Proportional to 359,998.40, 539,997.60 and 290,014.40

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Solution

The fourth proportional to 359,998.40, 539,997.60 and 290,014.40 is: 435,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,998.40 : 539,997.60 = 290,014.40 : x
  2. Step 2: Convert to fraction form
    359,998.40/539,997.60 = 290,014.40/x
  3. Step 3: Cross multiply
    359,998.40x = 539,997.60 × 290,014.40
  4. Step 4: Simplify right side
    359,998.40x = 156,607,079,965.44
  5. Step 5: Solve for x
    x = 156,607,079,965.44/359,998.40
  6. Step 6: Final answer
    x = 435,021.60

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Similar ratio
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1.5x scale

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.