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Finding the Fourth Proportional to 489,309.40, 733,964.10 and 427,101.40

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Solution

The fourth proportional to 489,309.40, 733,964.10 and 427,101.40 is: 640,652.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,309.40 : 733,964.10 = 427,101.40 : x
  2. Step 2: Convert to fraction form
    489,309.40/733,964.10 = 427,101.40/x
  3. Step 3: Cross multiply
    489,309.40x = 733,964.10 × 427,101.40
  4. Step 4: Simplify right side
    489,309.40x = 313,477,094,659.74
  5. Step 5: Solve for x
    x = 313,477,094,659.74/489,309.40
  6. Step 6: Final answer
    x = 640,652.10

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.