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Finding the Fourth Proportional to 358,980.60, 538,470.90 and 274,999.80

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Solution

The fourth proportional to 358,980.60, 538,470.90 and 274,999.80 is: 412,499.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,980.60 : 538,470.90 = 274,999.80 : x
  2. Step 2: Convert to fraction form
    358,980.60/538,470.90 = 274,999.80/x
  3. Step 3: Cross multiply
    358,980.60x = 538,470.90 × 274,999.80
  4. Step 4: Simplify right side
    358,980.60x = 148,079,389,805.82
  5. Step 5: Solve for x
    x = 148,079,389,805.82/358,980.60
  6. Step 6: Final answer
    x = 412,499.70

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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.