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Finding the Fourth Proportional to 308,725.20, 463,087.80 and 121,712.40

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Solution

The fourth proportional to 308,725.20, 463,087.80 and 121,712.40 is: 182,568.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,725.20 : 463,087.80 = 121,712.40 : x
  2. Step 2: Convert to fraction form
    308,725.20/463,087.80 = 121,712.40/x
  3. Step 3: Cross multiply
    308,725.20x = 463,087.80 × 121,712.40
  4. Step 4: Simplify right side
    308,725.20x = 56,363,527,548.72
  5. Step 5: Solve for x
    x = 56,363,527,548.72/308,725.20
  6. Step 6: Final answer
    x = 182,568.60

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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.