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Finding the Fourth Proportional to 257,712.20, 385,912.20 and 245,902.40

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Solution

The fourth proportional to 257,712.20, 385,912.20 and 245,902.40 is: 368,227.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,712.20 : 385,912.20 = 245,902.40 : x
  2. Step 2: Convert to fraction form
    257,712.20/385,912.20 = 245,902.40/x
  3. Step 3: Cross multiply
    257,712.20x = 385,912.20 × 245,902.40
  4. Step 4: Simplify right side
    257,712.20x = 94,896,736,169.28
  5. Step 5: Solve for x
    x = 94,896,736,169.28/257,712.20
  6. Step 6: Final answer
    x = 368,227.57

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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.