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Finding the Fourth Proportional to 543,211.78, 749,725.03 and 313,727.82

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Solution

The fourth proportional to 543,211.78, 749,725.03 and 313,727.82 is: 432,997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,211.78 : 749,725.03 = 313,727.82 : x
  2. Step 2: Convert to fraction form
    543,211.78/749,725.03 = 313,727.82/x
  3. Step 3: Cross multiply
    543,211.78x = 749,725.03 × 313,727.82
  4. Step 4: Simplify right side
    543,211.78x = 235,209,599,261.34
  5. Step 5: Solve for x
    x = 235,209,599,261.34/543,211.78
  6. Step 6: Final answer
    x = 432,997.97

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1.5x scale

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.