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Finding the Fourth Proportional to 551,418.70, 827,128.05 and 528,090.70

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Solution

The fourth proportional to 551,418.70, 827,128.05 and 528,090.70 is: 792,136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,418.70 : 827,128.05 = 528,090.70 : x
  2. Step 2: Convert to fraction form
    551,418.70/827,128.05 = 528,090.70/x
  3. Step 3: Cross multiply
    551,418.70x = 827,128.05 × 528,090.70
  4. Step 4: Simplify right side
    551,418.70x = 436,798,630,914.14
  5. Step 5: Solve for x
    x = 436,798,630,914.14/551,418.70
  6. Step 6: Final answer
    x = 792,136.05

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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.