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Finding the Fourth Proportional to 442,890, 611,221.05 and 251,964.90

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Solution

The fourth proportional to 442,890, 611,221.05 and 251,964.90 is: 347,730.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,890 : 611,221.05 = 251,964.90 : x
  2. Step 2: Convert to fraction form
    442,890/611,221.05 = 251,964.90/x
  3. Step 3: Cross multiply
    442,890x = 611,221.05 × 251,964.90
  4. Step 4: Simplify right side
    442,890x = 154,006,250,741.15
  5. Step 5: Solve for x
    x = 154,006,250,741.15/442,890
  6. Step 6: Final answer
    x = 347,730.25

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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.