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Finding the Fourth Proportional to 717,872.62, 990,670.86 and 395,594.25

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Solution

The fourth proportional to 717,872.62, 990,670.86 and 395,594.25 is: 545,923.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,872.62 : 990,670.86 = 395,594.25 : x
  2. Step 2: Convert to fraction form
    717,872.62/990,670.86 = 395,594.25/x
  3. Step 3: Cross multiply
    717,872.62x = 990,670.86 × 395,594.25
  4. Step 4: Simplify right side
    717,872.62x = 391,903,695,858.56
  5. Step 5: Solve for x
    x = 391,903,695,858.56/717,872.62
  6. Step 6: Final answer
    x = 545,923.73

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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.