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Finding the Fourth Proportional to 703,979.46, 971,487 and 381,688.56

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Solution

The fourth proportional to 703,979.46, 971,487 and 381,688.56 is: 526,727.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,979.46 : 971,487 = 381,688.56 : x
  2. Step 2: Convert to fraction form
    703,979.46/971,487 = 381,688.56/x
  3. Step 3: Cross multiply
    703,979.46x = 971,487 × 381,688.56
  4. Step 4: Simplify right side
    703,979.46x = 370,805,474,088.72
  5. Step 5: Solve for x
    x = 370,805,474,088.72/703,979.46
  6. Step 6: Final answer
    x = 526,727.69

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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.