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Finding the Fourth Proportional to 388,959.54, 583,439.85 and 256,431.66

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Solution

The fourth proportional to 388,959.54, 583,439.85 and 256,431.66 is: 384,647.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,959.54 : 583,439.85 = 256,431.66 : x
  2. Step 2: Convert to fraction form
    388,959.54/583,439.85 = 256,431.66/x
  3. Step 3: Cross multiply
    388,959.54x = 583,439.85 × 256,431.66
  4. Step 4: Simplify right side
    388,959.54x = 149,612,449,245.65
  5. Step 5: Solve for x
    x = 149,612,449,245.65/388,959.54
  6. Step 6: Final answer
    x = 384,647.85

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1.5x scale

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.