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Finding the Fourth Proportional to 384,425.40, 576,119.70 and 257,705.40

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Solution

The fourth proportional to 384,425.40, 576,119.70 and 257,705.40 is: 386,210.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,425.40 : 576,119.70 = 257,705.40 : x
  2. Step 2: Convert to fraction form
    384,425.40/576,119.70 = 257,705.40/x
  3. Step 3: Cross multiply
    384,425.40x = 576,119.70 × 257,705.40
  4. Step 4: Simplify right side
    384,425.40x = 148,469,157,736.38
  5. Step 5: Solve for x
    x = 148,469,157,736.38/384,425.40
  6. Step 6: Final answer
    x = 386,210.58

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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.