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Finding the Fourth Proportional to 261,364.32, 388,726.56 and 256,344.48

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Solution

The fourth proportional to 261,364.32, 388,726.56 and 256,344.48 is: 381,260.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,364.32 : 388,726.56 = 256,344.48 : x
  2. Step 2: Convert to fraction form
    261,364.32/388,726.56 = 256,344.48/x
  3. Step 3: Cross multiply
    261,364.32x = 388,726.56 × 256,344.48
  4. Step 4: Simplify right side
    261,364.32x = 99,647,907,885.39
  5. Step 5: Solve for x
    x = 99,647,907,885.39/261,364.32
  6. Step 6: Final answer
    x = 381,260.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.