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Finding the Fourth Proportional to 703,728.21, 971,248.69 and 445,628.72

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Solution

The fourth proportional to 703,728.21, 971,248.69 and 445,628.72 is: 615,033.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,728.21 : 971,248.69 = 445,628.72 : x
  2. Step 2: Convert to fraction form
    703,728.21/971,248.69 = 445,628.72/x
  3. Step 3: Cross multiply
    703,728.21x = 971,248.69 × 445,628.72
  4. Step 4: Simplify right side
    703,728.21x = 432,816,313,511.53
  5. Step 5: Solve for x
    x = 432,816,313,511.53/703,728.21
  6. Step 6: Final answer
    x = 615,033.34

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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.