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Finding the Fourth Proportional to 286,309.28, 428,809.65 and 136,654.62

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Solution

The fourth proportional to 286,309.28, 428,809.65 and 136,654.62 is: 204,669.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,309.28 : 428,809.65 = 136,654.62 : x
  2. Step 2: Convert to fraction form
    286,309.28/428,809.65 = 136,654.62/x
  3. Step 3: Cross multiply
    286,309.28x = 428,809.65 × 136,654.62
  4. Step 4: Simplify right side
    286,309.28x = 58,598,818,858.62
  5. Step 5: Solve for x
    x = 58,598,818,858.62/286,309.28
  6. Step 6: Final answer
    x = 204,669.64

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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.