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Finding the Fourth Proportional to 721,596.56, 995,788.35 and 399,306.47

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Solution

The fourth proportional to 721,596.56, 995,788.35 and 399,306.47 is: 551,034.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,596.56 : 995,788.35 = 399,306.47 : x
  2. Step 2: Convert to fraction form
    721,596.56/995,788.35 = 399,306.47/x
  3. Step 3: Cross multiply
    721,596.56x = 995,788.35 × 399,306.47
  4. Step 4: Simplify right side
    721,596.56x = 397,624,725,926.68
  5. Step 5: Solve for x
    x = 397,624,725,926.68/721,596.56
  6. Step 6: Final answer
    x = 551,034.68

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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.