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Finding the Fourth Proportional to 721,460.84, 995,645.32 and 399,165.72

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Solution

The fourth proportional to 721,460.84, 995,645.32 and 399,165.72 is: 550,864.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,460.84 : 995,645.32 = 399,165.72 : x
  2. Step 2: Convert to fraction form
    721,460.84/995,645.32 = 399,165.72/x
  3. Step 3: Cross multiply
    721,460.84x = 995,645.32 × 399,165.72
  4. Step 4: Simplify right side
    721,460.84x = 397,427,481,022.43
  5. Step 5: Solve for x
    x = 397,427,481,022.43/721,460.84
  6. Step 6: Final answer
    x = 550,864.94

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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.