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Finding the Fourth Proportional to 617,081.88, 924,128.64 and 427,009.44

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Solution

The fourth proportional to 617,081.88, 924,128.64 and 427,009.44 is: 639,480.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,081.88 : 924,128.64 = 427,009.44 : x
  2. Step 2: Convert to fraction form
    617,081.88/924,128.64 = 427,009.44/x
  3. Step 3: Cross multiply
    617,081.88x = 924,128.64 × 427,009.44
  4. Step 4: Simplify right side
    617,081.88x = 394,611,653,054.36
  5. Step 5: Solve for x
    x = 394,611,653,054.36/617,081.88
  6. Step 6: Final answer
    x = 639,480.21

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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.