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Finding the Fourth Proportional to 721,583.85, 995,794.56 and 399,323.93

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Solution

The fourth proportional to 721,583.85, 995,794.56 and 399,323.93 is: 551,071.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,583.85 : 995,794.56 = 399,323.93 : x
  2. Step 2: Convert to fraction form
    721,583.85/995,794.56 = 399,323.93/x
  3. Step 3: Cross multiply
    721,583.85x = 995,794.56 × 399,323.93
  4. Step 4: Simplify right side
    721,583.85x = 397,644,592,192.85
  5. Step 5: Solve for x
    x = 397,644,592,192.85/721,583.85
  6. Step 6: Final answer
    x = 551,071.92

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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.