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Finding the Fourth Proportional to 321,009.80, 481,514.70 and 155,121.80

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Solution

The fourth proportional to 321,009.80, 481,514.70 and 155,121.80 is: 232,682.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,009.80 : 481,514.70 = 155,121.80 : x
  2. Step 2: Convert to fraction form
    321,009.80/481,514.70 = 155,121.80/x
  3. Step 3: Cross multiply
    321,009.80x = 481,514.70 × 155,121.80
  4. Step 4: Simplify right side
    321,009.80x = 74,693,426,990.46
  5. Step 5: Solve for x
    x = 74,693,426,990.46/321,009.80
  6. Step 6: Final answer
    x = 232,682.70

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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.