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Finding the Fourth Proportional to 393,485.04, 543,009.42 and 223,729.56

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Solution

The fourth proportional to 393,485.04, 543,009.42 and 223,729.56 is: 308,746.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,485.04 : 543,009.42 = 223,729.56 : x
  2. Step 2: Convert to fraction form
    393,485.04/543,009.42 = 223,729.56/x
  3. Step 3: Cross multiply
    393,485.04x = 543,009.42 × 223,729.56
  4. Step 4: Simplify right side
    393,485.04x = 121,487,258,612.46
  5. Step 5: Solve for x
    x = 121,487,258,612.46/393,485.04
  6. Step 6: Final answer
    x = 308,746.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.