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Finding the Fourth Proportional to 393,669, 543,260.26 and 223,902.92

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Solution

The fourth proportional to 393,669, 543,260.26 and 223,902.92 is: 308,984.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,669 : 543,260.26 = 223,902.92 : x
  2. Step 2: Convert to fraction form
    393,669/543,260.26 = 223,902.92/x
  3. Step 3: Cross multiply
    393,669x = 543,260.26 × 223,902.92
  4. Step 4: Simplify right side
    393,669x = 121,637,558,533.96
  5. Step 5: Solve for x
    x = 121,637,558,533.96/393,669
  6. Step 6: Final answer
    x = 308,984.35

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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.