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Finding the Fourth Proportional to 385,598.80, 578,052.60 and 343,608.40

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Solution

The fourth proportional to 385,598.80, 578,052.60 and 343,608.40 is: 515,104.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,598.80 : 578,052.60 = 343,608.40 : x
  2. Step 2: Convert to fraction form
    385,598.80/578,052.60 = 343,608.40/x
  3. Step 3: Cross multiply
    385,598.80x = 578,052.60 × 343,608.40
  4. Step 4: Simplify right side
    385,598.80x = 198,623,729,001.84
  5. Step 5: Solve for x
    x = 198,623,729,001.84/385,598.80
  6. Step 6: Final answer
    x = 515,104.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.