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Finding the Fourth Proportional to 259,417, 388,621.98 and 170,400.40

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Solution

The fourth proportional to 259,417, 388,621.98 and 170,400.40 is: 255,269.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,417 : 388,621.98 = 170,400.40 : x
  2. Step 2: Convert to fraction form
    259,417/388,621.98 = 170,400.40/x
  3. Step 3: Cross multiply
    259,417x = 388,621.98 × 170,400.40
  4. Step 4: Simplify right side
    259,417x = 66,221,340,840.79
  5. Step 5: Solve for x
    x = 66,221,340,840.79/259,417
  6. Step 6: Final answer
    x = 255,269.86

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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.