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Finding the Fourth Proportional to 321,015.80, 481,523.70 and 155,127.80

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Solution

The fourth proportional to 321,015.80, 481,523.70 and 155,127.80 is: 232,691.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,015.80 : 481,523.70 = 155,127.80 : x
  2. Step 2: Convert to fraction form
    321,015.80/481,523.70 = 155,127.80/x
  3. Step 3: Cross multiply
    321,015.80x = 481,523.70 × 155,127.80
  4. Step 4: Simplify right side
    321,015.80x = 74,697,712,228.86
  5. Step 5: Solve for x
    x = 74,697,712,228.86/321,015.80
  6. Step 6: Final answer
    x = 232,691.70

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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.