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Finding the Fourth Proportional to 721,322.34, 995,454.15 and 399,026.88

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Solution

The fourth proportional to 721,322.34, 995,454.15 and 399,026.88 is: 550,673.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,322.34 : 995,454.15 = 399,026.88 : x
  2. Step 2: Convert to fraction form
    721,322.34/995,454.15 = 399,026.88/x
  3. Step 3: Cross multiply
    721,322.34x = 995,454.15 × 399,026.88
  4. Step 4: Simplify right side
    721,322.34x = 397,212,963,657.55
  5. Step 5: Solve for x
    x = 397,212,963,657.55/721,322.34
  6. Step 6: Final answer
    x = 550,673.31

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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.