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Finding the Fourth Proportional to 310,879.20, 429,044.40 and 190,074.72

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Solution

The fourth proportional to 310,879.20, 429,044.40 and 190,074.72 is: 262,322.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,879.20 : 429,044.40 = 190,074.72 : x
  2. Step 2: Convert to fraction form
    310,879.20/429,044.40 = 190,074.72/x
  3. Step 3: Cross multiply
    310,879.20x = 429,044.40 × 190,074.72
  4. Step 4: Simplify right side
    310,879.20x = 81,550,494,197.57
  5. Step 5: Solve for x
    x = 81,550,494,197.57/310,879.20
  6. Step 6: Final answer
    x = 262,322.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.