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Finding the Fourth Proportional to 717,872.25, 990,670.34 and 395,593.88

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Solution

The fourth proportional to 717,872.25, 990,670.34 and 395,593.88 is: 545,923.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,872.25 : 990,670.34 = 395,593.88 : x
  2. Step 2: Convert to fraction form
    717,872.25/990,670.34 = 395,593.88/x
  3. Step 3: Cross multiply
    717,872.25x = 990,670.34 × 395,593.88
  4. Step 4: Simplify right side
    717,872.25x = 391,903,121,369.98
  5. Step 5: Solve for x
    x = 391,903,121,369.98/717,872.25
  6. Step 6: Final answer
    x = 545,923.21

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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.