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Finding the Fourth Proportional to 717,812.68, 990,625.62 and 395,522.69

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Solution

The fourth proportional to 717,812.68, 990,625.62 and 395,522.69 is: 545,845.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,812.68 : 990,625.62 = 395,522.69 : x
  2. Step 2: Convert to fraction form
    717,812.68/990,625.62 = 395,522.69/x
  3. Step 3: Cross multiply
    717,812.68x = 990,625.62 × 395,522.69
  4. Step 4: Simplify right side
    717,812.68x = 391,814,910,005.32
  5. Step 5: Solve for x
    x = 391,814,910,005.32/717,812.68
  6. Step 6: Final answer
    x = 545,845.63

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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.