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Finding the Fourth Proportional to 393,362.10, 590,043.15 and 112,907.70

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Solution

The fourth proportional to 393,362.10, 590,043.15 and 112,907.70 is: 169,361.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,362.10 : 590,043.15 = 112,907.70 : x
  2. Step 2: Convert to fraction form
    393,362.10/590,043.15 = 112,907.70/x
  3. Step 3: Cross multiply
    393,362.10x = 590,043.15 × 112,907.70
  4. Step 4: Simplify right side
    393,362.10x = 66,620,414,967.26
  5. Step 5: Solve for x
    x = 66,620,414,967.26/393,362.10
  6. Step 6: Final answer
    x = 169,361.55

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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.