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Finding the Fourth Proportional to 652,081.10, 978,121.65 and 272,936.30

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Solution

The fourth proportional to 652,081.10, 978,121.65 and 272,936.30 is: 409,404.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,081.10 : 978,121.65 = 272,936.30 : x
  2. Step 2: Convert to fraction form
    652,081.10/978,121.65 = 272,936.30/x
  3. Step 3: Cross multiply
    652,081.10x = 978,121.65 × 272,936.30
  4. Step 4: Simplify right side
    652,081.10x = 266,964,904,100.90
  5. Step 5: Solve for x
    x = 266,964,904,100.90/652,081.10
  6. Step 6: Final answer
    x = 409,404.45

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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.