Home / 717,443.82-990,117.39-395,153.79

Finding the Fourth Proportional to 717,443.82, 990,117.39 and 395,153.79

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Solution

The fourth proportional to 717,443.82, 990,117.39 and 395,153.79 is: 545,336.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,443.82 : 990,117.39 = 395,153.79 : x
  2. Step 2: Convert to fraction form
    717,443.82/990,117.39 = 395,153.79/x
  3. Step 3: Cross multiply
    717,443.82x = 990,117.39 × 395,153.79
  4. Step 4: Simplify right side
    717,443.82x = 391,248,639,203.41
  5. Step 5: Solve for x
    x = 391,248,639,203.41/717,443.82
  6. Step 6: Final answer
    x = 545,336.97

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Double scale
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Similar ratio
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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.