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Finding the Fourth Proportional to 321,009.30, 481,513.95 and 155,121.30

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Solution

The fourth proportional to 321,009.30, 481,513.95 and 155,121.30 is: 232,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,009.30 : 481,513.95 = 155,121.30 : x
  2. Step 2: Convert to fraction form
    321,009.30/481,513.95 = 155,121.30/x
  3. Step 3: Cross multiply
    321,009.30x = 481,513.95 × 155,121.30
  4. Step 4: Simplify right side
    321,009.30x = 74,693,069,892.14
  5. Step 5: Solve for x
    x = 74,693,069,892.14/321,009.30
  6. Step 6: Final answer
    x = 232,681.95

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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.