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Finding the Fourth Proportional to 660,640.40, 990,960.60 and 187,341.20

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Solution

The fourth proportional to 660,640.40, 990,960.60 and 187,341.20 is: 281,011.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,640.40 : 990,960.60 = 187,341.20 : x
  2. Step 2: Convert to fraction form
    660,640.40/990,960.60 = 187,341.20/x
  3. Step 3: Cross multiply
    660,640.40x = 990,960.60 × 187,341.20
  4. Step 4: Simplify right side
    660,640.40x = 185,647,747,956.72
  5. Step 5: Solve for x
    x = 185,647,747,956.72/660,640.40
  6. Step 6: Final answer
    x = 281,011.80

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1.5x scale

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.