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Finding the Fourth Proportional to 265,963.32, 397,387.44 and 256,661.28

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Solution

The fourth proportional to 265,963.32, 397,387.44 and 256,661.28 is: 383,488.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,963.32 : 397,387.44 = 256,661.28 : x
  2. Step 2: Convert to fraction form
    265,963.32/397,387.44 = 256,661.28/x
  3. Step 3: Cross multiply
    265,963.32x = 397,387.44 × 256,661.28
  4. Step 4: Simplify right side
    265,963.32x = 101,993,969,006.32
  5. Step 5: Solve for x
    x = 101,993,969,006.32/265,963.32
  6. Step 6: Final answer
    x = 383,488.85

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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.