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Finding the Fourth Proportional to 703,423.21, 970,724.39 and 381,133.56

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Solution

The fourth proportional to 703,423.21, 970,724.39 and 381,133.56 is: 525,964.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,423.21 : 970,724.39 = 381,133.56 : x
  2. Step 2: Convert to fraction form
    703,423.21/970,724.39 = 381,133.56/x
  3. Step 3: Cross multiply
    703,423.21x = 970,724.39 × 381,133.56
  4. Step 4: Simplify right side
    703,423.21x = 369,975,643,492.36
  5. Step 5: Solve for x
    x = 369,975,643,492.36/703,423.21
  6. Step 6: Final answer
    x = 525,964.51

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Double scale
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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.