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Finding the Fourth Proportional to 385,270.20, 577,905.30 and 245,647.80

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Solution

The fourth proportional to 385,270.20, 577,905.30 and 245,647.80 is: 368,471.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,270.20 : 577,905.30 = 245,647.80 : x
  2. Step 2: Convert to fraction form
    385,270.20/577,905.30 = 245,647.80/x
  3. Step 3: Cross multiply
    385,270.20x = 577,905.30 × 245,647.80
  4. Step 4: Simplify right side
    385,270.20x = 141,961,165,553.34
  5. Step 5: Solve for x
    x = 141,961,165,553.34/385,270.20
  6. Step 6: Final answer
    x = 368,471.70

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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.