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Finding the Fourth Proportional to 721,546.68, 995,692.96 and 399,240.60

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Solution

The fourth proportional to 721,546.68, 995,692.96 and 399,240.60 is: 550,929.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,546.68 : 995,692.96 = 399,240.60 : x
  2. Step 2: Convert to fraction form
    721,546.68/995,692.96 = 399,240.60/x
  3. Step 3: Cross multiply
    721,546.68x = 995,692.96 × 399,240.60
  4. Step 4: Simplify right side
    721,546.68x = 397,521,049,285.65
  5. Step 5: Solve for x
    x = 397,521,049,285.65/721,546.68
  6. Step 6: Final answer
    x = 550,929.08

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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.