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Finding the Fourth Proportional to 542,991.76, 749,768.88 and 339,280

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Solution

The fourth proportional to 542,991.76, 749,768.88 and 339,280 is: 468,481.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,991.76 : 749,768.88 = 339,280 : x
  2. Step 2: Convert to fraction form
    542,991.76/749,768.88 = 339,280/x
  3. Step 3: Cross multiply
    542,991.76x = 749,768.88 × 339,280
  4. Step 4: Simplify right side
    542,991.76x = 254,381,585,606.40
  5. Step 5: Solve for x
    x = 254,381,585,606.40/542,991.76
  6. Step 6: Final answer
    x = 468,481.48

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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.