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Finding the Fourth Proportional to 617,987.28, 926,747.64 and 285,330

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Solution

The fourth proportional to 617,987.28, 926,747.64 and 285,330 is: 427,887.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,987.28 : 926,747.64 = 285,330 : x
  2. Step 2: Convert to fraction form
    617,987.28/926,747.64 = 285,330/x
  3. Step 3: Cross multiply
    617,987.28x = 926,747.64 × 285,330
  4. Step 4: Simplify right side
    617,987.28x = 264,428,904,121.20
  5. Step 5: Solve for x
    x = 264,428,904,121.20/617,987.28
  6. Step 6: Final answer
    x = 427,887.29

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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.