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Finding the Fourth Proportional to 551,126.57, 760,495.91 and 309,435.72

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Solution

The fourth proportional to 551,126.57, 760,495.91 and 309,435.72 is: 426,988.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,126.57 : 760,495.91 = 309,435.72 : x
  2. Step 2: Convert to fraction form
    551,126.57/760,495.91 = 309,435.72/x
  3. Step 3: Cross multiply
    551,126.57x = 760,495.91 × 309,435.72
  4. Step 4: Simplify right side
    551,126.57x = 235,324,597,920.73
  5. Step 5: Solve for x
    x = 235,324,597,920.73/551,126.57
  6. Step 6: Final answer
    x = 426,988.31

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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.