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Finding the Fourth Proportional to 359,405.10, 538,451.55 and 218,999.70

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Solution

The fourth proportional to 359,405.10, 538,451.55 and 218,999.70 is: 328,099.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,405.10 : 538,451.55 = 218,999.70 : x
  2. Step 2: Convert to fraction form
    359,405.10/538,451.55 = 218,999.70/x
  3. Step 3: Cross multiply
    359,405.10x = 538,451.55 × 218,999.70
  4. Step 4: Simplify right side
    359,405.10x = 117,920,727,914.54
  5. Step 5: Solve for x
    x = 117,920,727,914.54/359,405.10
  6. Step 6: Final answer
    x = 328,099.76

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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.