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Finding the Fourth Proportional to 717,459.80, 990,101.22 and 395,171.08

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Solution

The fourth proportional to 717,459.80, 990,101.22 and 395,171.08 is: 545,339.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,459.80 : 990,101.22 = 395,171.08 : x
  2. Step 2: Convert to fraction form
    717,459.80/990,101.22 = 395,171.08/x
  3. Step 3: Cross multiply
    717,459.80x = 990,101.22 × 395,171.08
  4. Step 4: Simplify right side
    717,459.80x = 391,259,368,416.72
  5. Step 5: Solve for x
    x = 391,259,368,416.72/717,459.80
  6. Step 6: Final answer
    x = 545,339.78

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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.