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Finding the Fourth Proportional to 551,134.53, 760,506.98 and 309,443.49

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Solution

The fourth proportional to 551,134.53, 760,506.98 and 309,443.49 is: 426,999.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,134.53 : 760,506.98 = 309,443.49 : x
  2. Step 2: Convert to fraction form
    551,134.53/760,506.98 = 309,443.49/x
  3. Step 3: Cross multiply
    551,134.53x = 760,506.98 × 309,443.49
  4. Step 4: Simplify right side
    551,134.53x = 235,333,932,513.34
  5. Step 5: Solve for x
    x = 235,333,932,513.34/551,134.53
  6. Step 6: Final answer
    x = 426,999.07

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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.