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Finding the Fourth Proportional to 611,112.90, 843,319.59 and 339,173.78

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Solution

The fourth proportional to 611,112.90, 843,319.59 and 339,173.78 is: 468,050.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,112.90 : 843,319.59 = 339,173.78 : x
  2. Step 2: Convert to fraction form
    611,112.90/843,319.59 = 339,173.78/x
  3. Step 3: Cross multiply
    611,112.90x = 843,319.59 × 339,173.78
  4. Step 4: Simplify right side
    611,112.90x = 286,031,891,827.99
  5. Step 5: Solve for x
    x = 286,031,891,827.99/611,112.90
  6. Step 6: Final answer
    x = 468,050.82

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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.