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Finding the Fourth Proportional to 717,458.55, 990,099.50 and 395,169.81

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Solution

The fourth proportional to 717,458.55, 990,099.50 and 395,169.81 is: 545,338.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,458.55 : 990,099.50 = 395,169.81 : x
  2. Step 2: Convert to fraction form
    717,458.55/990,099.50 = 395,169.81/x
  3. Step 3: Cross multiply
    717,458.55x = 990,099.50 × 395,169.81
  4. Step 4: Simplify right side
    717,458.55x = 391,257,431,296.10
  5. Step 5: Solve for x
    x = 391,257,431,296.10/717,458.55
  6. Step 6: Final answer
    x = 545,338.03

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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.