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Finding the Fourth Proportional to 485,071.39, 669,418.69 and 270,211.40

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Solution

The fourth proportional to 485,071.39, 669,418.69 and 270,211.40 is: 372,902.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,071.39 : 669,418.69 = 270,211.40 : x
  2. Step 2: Convert to fraction form
    485,071.39/669,418.69 = 270,211.40/x
  3. Step 3: Cross multiply
    485,071.39x = 669,418.69 × 270,211.40
  4. Step 4: Simplify right side
    485,071.39x = 180,884,557,388.44
  5. Step 5: Solve for x
    x = 180,884,557,388.44/485,071.39
  6. Step 6: Final answer
    x = 372,902.96

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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.