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Finding the Fourth Proportional to 259,365.16, 388,420.76 and 214,662.88

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Solution

The fourth proportional to 259,365.16, 388,420.76 and 214,662.88 is: 321,475.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,365.16 : 388,420.76 = 214,662.88 : x
  2. Step 2: Convert to fraction form
    259,365.16/388,420.76 = 214,662.88/x
  3. Step 3: Cross multiply
    259,365.16x = 388,420.76 × 214,662.88
  4. Step 4: Simplify right side
    259,365.16x = 83,379,518,993.39
  5. Step 5: Solve for x
    x = 83,379,518,993.39/259,365.16
  6. Step 6: Final answer
    x = 321,475.40

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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.