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Finding the Fourth Proportional to 551,336, 760,786.96 and 309,616.62

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Solution

The fourth proportional to 551,336, 760,786.96 and 309,616.62 is: 427,239.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,336 : 760,786.96 = 309,616.62 : x
  2. Step 2: Convert to fraction form
    551,336/760,786.96 = 309,616.62/x
  3. Step 3: Cross multiply
    551,336x = 760,786.96 × 309,616.62
  4. Step 4: Simplify right side
    551,336x = 235,552,287,095.28
  5. Step 5: Solve for x
    x = 235,552,287,095.28/551,336
  6. Step 6: Final answer
    x = 427,239.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.