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Finding the Fourth Proportional to 479,225.60, 661,307.76 and 288,201.92

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Solution

The fourth proportional to 479,225.60, 661,307.76 and 288,201.92 is: 397,704.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,225.60 : 661,307.76 = 288,201.92 : x
  2. Step 2: Convert to fraction form
    479,225.60/661,307.76 = 288,201.92/x
  3. Step 3: Cross multiply
    479,225.60x = 661,307.76 × 288,201.92
  4. Step 4: Simplify right side
    479,225.60x = 190,590,166,142.90
  5. Step 5: Solve for x
    x = 190,590,166,142.90/479,225.60
  6. Step 6: Final answer
    x = 397,704.48

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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.