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Finding the Fourth Proportional to 390,651.40, 585,539.70 and 222,252.40

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Solution

The fourth proportional to 390,651.40, 585,539.70 and 222,252.40 is: 333,129.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,651.40 : 585,539.70 = 222,252.40 : x
  2. Step 2: Convert to fraction form
    390,651.40/585,539.70 = 222,252.40/x
  3. Step 3: Cross multiply
    390,651.40x = 585,539.70 × 222,252.40
  4. Step 4: Simplify right side
    390,651.40x = 130,137,603,620.28
  5. Step 5: Solve for x
    x = 130,137,603,620.28/390,651.40
  6. Step 6: Final answer
    x = 333,129.75

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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.