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Finding the Fourth Proportional to 431,320.80, 646,827.60 and 194,776.80

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Solution

The fourth proportional to 431,320.80, 646,827.60 and 194,776.80 is: 292,095.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,320.80 : 646,827.60 = 194,776.80 : x
  2. Step 2: Convert to fraction form
    431,320.80/646,827.60 = 194,776.80/x
  3. Step 3: Cross multiply
    431,320.80x = 646,827.60 × 194,776.80
  4. Step 4: Simplify right side
    431,320.80x = 125,987,010,079.68
  5. Step 5: Solve for x
    x = 125,987,010,079.68/431,320.80
  6. Step 6: Final answer
    x = 292,095.84

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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.