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Finding the Fourth Proportional to 390,601.40, 585,464.70 and 222,202.40

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Solution

The fourth proportional to 390,601.40, 585,464.70 and 222,202.40 is: 333,054.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,601.40 : 585,464.70 = 222,202.40 : x
  2. Step 2: Convert to fraction form
    390,601.40/585,464.70 = 222,202.40/x
  3. Step 3: Cross multiply
    390,601.40x = 585,464.70 × 222,202.40
  4. Step 4: Simplify right side
    390,601.40x = 130,091,661,455.28
  5. Step 5: Solve for x
    x = 130,091,661,455.28/390,601.40
  6. Step 6: Final answer
    x = 333,054.78

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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.