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Finding the Fourth Proportional to 717,486.86, 990,131.76 and 395,196.95

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Solution

The fourth proportional to 717,486.86, 990,131.76 and 395,196.95 is: 545,371.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,486.86 : 990,131.76 = 395,196.95 : x
  2. Step 2: Convert to fraction form
    717,486.86/990,131.76 = 395,196.95/x
  3. Step 3: Cross multiply
    717,486.86x = 990,131.76 × 395,196.95
  4. Step 4: Simplify right side
    717,486.86x = 391,297,044,723.49
  5. Step 5: Solve for x
    x = 391,297,044,723.49/717,486.86
  6. Step 6: Final answer
    x = 545,371.73

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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.