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Finding the Fourth Proportional to 718,165.22, 991,023 and 395,878.10

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Solution

The fourth proportional to 718,165.22, 991,023 and 395,878.10 is: 546,286.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,165.22 : 991,023 = 395,878.10 : x
  2. Step 2: Convert to fraction form
    718,165.22/991,023 = 395,878.10/x
  3. Step 3: Cross multiply
    718,165.22x = 991,023 × 395,878.10
  4. Step 4: Simplify right side
    718,165.22x = 392,324,302,296.30
  5. Step 5: Solve for x
    x = 392,324,302,296.30/718,165.22
  6. Step 6: Final answer
    x = 546,286.97

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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.